Clinical Trial Results:
Qutenza TM versus pregabalin in patients with Peripheral Neuropathic Pain (PNP) an Open-label, Randomized, Multicenter, Non-inferiority Efficacy and Tolerability Study.
Summary
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EudraCT number |
2011-005872-41 |
Trial protocol |
SE CZ FI AT SK ES BE SI GB DE GR PT IT BG |
Global end of trial date |
26 Sep 2013
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Results information
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Results version number |
v2(current) |
This version publication date |
04 Jun 2016
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First version publication date |
22 May 2015
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Other versions |
v1 |
Version creation reason |
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Trial Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
Subject Disposition
Baseline Characteristics
End Points
Adverse Events
More Information
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Trial identification
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Sponsor protocol code |
QTZ-EC-0004
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT01713426 | ||
WHO universal trial number (UTN) |
- | ||
Sponsors
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Sponsor organisation name |
Astellas Pharma Europe Ltd.
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Sponsor organisation address |
2000 Hillswood Drive, Chertsey, United Kingdom, KT16 0RS
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Public contact |
Associate Medical Director -
Pain Therapeutic Area, Astellas Pharma Europe Ltd. (APEL), Astellas.resultsdisclosure@astellas.com
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Scientific contact |
Associate Medical Director -
Pain Therapeutic Area, Astellas Pharma Europe Ltd. (APEL), Astellas.resultsdisclosure@astellas.com
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Paediatric regulatory details
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Is trial part of an agreed paediatric investigation plan (PIP) |
No
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Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial? |
No
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Results analysis stage
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Analysis stage |
Final
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Date of interim/final analysis |
26 Sep 2013
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Is this the analysis of the primary completion data? |
Yes
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Primary completion date |
26 Sep 2013
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Global end of trial reached? |
Yes
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Global end of trial date |
26 Sep 2013
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Was the trial ended prematurely? |
No
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General information about the trial
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Main objective of the trial |
Main objective of the trial was to compare the efficacy,tolerability and impact on health-related quality of life (HRQoL) of treatment with Qutenza (Capsaicin (8%) high-concentration patch) versus pregabalin in patients with Peripheral Neuropathic Pain (PNP) after 8 weeks.
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Protection of trial subjects |
This clinical study was written, conducted and reported in accordance with the protocol, ICH GCP Guidelines, and applicable local regulations, including the European Directive 2001/20/EC, on the protection of human rights, and with the ethical principles that have their origin in the Declaration of Helsinki. Astellas ensures that the use and disclosure of protected health information (PHI) obtained during a research study complies with the federal or and regional and national legislation related to the privacy and protection of personal information.The appropriate Competent Authority in each country approved the protocol prior to the start of the study. The original study protocol and the amendments were reviewed by the Independent Ethics Committee (IEC) at each study site. An IEC-approved written informed consent was obtained from each patient or legal guardian prior to the initiation of any study-specific procedures.
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Background therapy |
Patients remained on existing neuropathic pain medication(s) if the doses were maintained stable for more than 4 weeks prior to the baseline visit. Patients in the Qutenza (Capsaicin (8%) high-concentration patch) arm received a topical anesthetic on their painful affected area(s) prior to placement of Qutenza (Capsaicin (8%) high-concentration patch). In addition patients may have received a short-acting pain medication (including short-acting opioids) during patch application or as needed following patch application, to reduce patch-related pain/discomfort. Short-acting opioids could have been administered for up to 5 days following patch application. Patients could also be give non-opioid pain medications (e.g., paracetamol, NSAIDs) administered for conditions other than neuropathic pain. Other medical therapy not specifically prohibited, includes non-opioid pain medications (e.g., paracetamol, NSAIDs) administered for conditions other than neuropathic pain. Any changes, additions or discontinuations to medications were assessed and recorded at every study visit. Doses of any concomitant medication for the treatment of neuropathic pain had to remain stable for the duration of the study. | ||
Evidence for comparator |
Pregabalin belongs to the antiepileptic group of drugs and the active substance is a gamma-aminobutyric acid analogue. Pregabalin binds to an auxiliary subunit of voltage-gated calcium channels in the central nervous system, potently displacing 3H-gabapentin. Pregabalin is an anticonvulsant, which, along with tricyclic antidepressants such as amitriptyline can be considered the standard of care for the treatment of PNP. A flexible dose design has been chosen for pregabalin to best match clinical practice in Europe. The Summary of Product Characteristics (SmPC) for pregabalin states that the effective dose range is 150 to 600 mg/day. The SmPC advises that the dose of pregabalin should be up-titrated over a period of 10 to 14 days. To reduce the occurrence of dose-limiting side effects, up-titration of the dose in European clinical practice is often performed over a longer time period, using varying dose changes and frequency of up-titration steps. This study was designed to reflect as much as possible the current clinical practice and thus included an up-titration scheme performed over a period of 4 weeks, using gradual steps of 75 mg/day. This up-titration method was intended to provide a level of flexibility while minimizing variability and represents a compromise between the different clinical practices across Europe. Intolerance of any dose of pregabalin was recorded as an Adverse Event (AE). | ||
Actual start date of recruitment |
11 Jul 2012
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Long term follow-up planned |
No
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Independent data monitoring committee (IDMC) involvement? |
Yes
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Population of trial subjects
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Number of subjects enrolled per country |
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Country: Number of subjects enrolled |
Poland: 66
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Country: Number of subjects enrolled |
Portugal: 3
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Country: Number of subjects enrolled |
Slovakia: 14
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Country: Number of subjects enrolled |
Slovenia: 2
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Country: Number of subjects enrolled |
Spain: 10
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Country: Number of subjects enrolled |
Sweden: 4
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Country: Number of subjects enrolled |
United Kingdom: 30
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Country: Number of subjects enrolled |
Austria: 8
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Country: Number of subjects enrolled |
Belgium: 22
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Country: Number of subjects enrolled |
Bulgaria: 54
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Country: Number of subjects enrolled |
Czech Republic: 6
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Country: Number of subjects enrolled |
Finland: 4
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Country: Number of subjects enrolled |
France: 34
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Country: Number of subjects enrolled |
Germany: 29
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Country: Number of subjects enrolled |
Greece: 21
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Country: Number of subjects enrolled |
Hungary: 9
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Country: Number of subjects enrolled |
Italy: 37
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Country: Number of subjects enrolled |
Belarus: 8
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Country: Number of subjects enrolled |
Romania: 62
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Country: Number of subjects enrolled |
Russian Federation: 56
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Country: Number of subjects enrolled |
Turkey: 49
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Country: Number of subjects enrolled |
Armenia: 40
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Worldwide total number of subjects |
568
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EEA total number of subjects |
415
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Number of subjects enrolled per age group |
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In utero |
0
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Preterm newborn - gestational age < 37 wk |
0
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Newborns (0-27 days) |
0
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Infants and toddlers (28 days-23 months) |
0
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Children (2-11 years) |
0
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Adolescents (12-17 years) |
0
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Adults (18-64 years) |
413
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From 65 to 84 years |
155
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85 years and over |
0
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Recruitment
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Recruitment details |
This multinational, multicenter study was conducted at 92 contracted sites in a total of 22 countries. The study population consisted of males and females between 18 and 80 years of age with documented diagnosis of probable or definite PNP. | ||||||||||||||||||||||||
Pre-assignment
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Screening details |
Patients were screened in a 12-day period between Day -12 and Day -4 during which informed consent,collection of demographic, medical and medication history, a physical examination, vital signs (blood pressure and pulse rate) and safety laboratory tests data was collected. | ||||||||||||||||||||||||
Period 1
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Period 1 title |
Overall Trial (overall period)
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Is this the baseline period? |
Yes | ||||||||||||||||||||||||
Allocation method |
Randomised - controlled
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Blinding used |
Not blinded | ||||||||||||||||||||||||
Arms
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Are arms mutually exclusive |
Yes
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Arm title
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Qutenza [Capsaicin (8%) high-concentration patch] | ||||||||||||||||||||||||
Arm description |
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Arm type |
Experimental | ||||||||||||||||||||||||
Investigational medicinal product name |
Qutenza (Capsaicin (8%) high-concentration patch)
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Investigational medicinal product code |
ASP0805
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Other name |
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Pharmaceutical forms |
Cutaneous patch
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Routes of administration |
Topical use
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Dosage and administration details |
Qutenza is a high concentration (8%) capsaicin patch. Participants received a topical anesthetic cream (e.g., 4% lidocaine cream) on their painful affected area(s) prior to placement of Qutenza patches. Up to 4 patches of Qutenza (1120 cm2) were applied for 60 minutes to the painful areas of the body (as defined by the study physician), except the feet, where a 30 minute application time was used. The patches were removed after 30 minutes (feet) or 60 minutes (other body locations) and the treatment area(s) were cleansed using study-supplied cleansing gel. The rationale for the application times was to keep the mode of administration in full accordance with the approved SmPC.
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Arm title
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Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated] | ||||||||||||||||||||||||
Arm description |
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Arm type |
Active comparator | ||||||||||||||||||||||||
Investigational medicinal product name |
Pregabalin [75 mg hard capsule to be taken orally gamma-aminobutyric acid analogue]
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Capsule, hard
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Routes of administration |
Oral use
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Dosage and administration details |
Pregablin was administered daily in 75-mg capsules to best match clinical practice in Europe. Patients were prescribed 150 to 600 mg/day of pregabalin, administered in 2 or 3 divided doses daily. All patients started with a daily dose of 75-mg which was up-titrated to 150 mg/day after 3 or 4 days. Further up-titration was at the discretion of the investigator, however patients were up-titrated to a maximum tolerated dose or until the patient experienced a clinically meaningful reduction in pain (≥ 30% reduction in pain from Baseline). Up-titration occurred in 75-mg steps every 3 to 4 days, up to a maximum dose of 600 mg/day. If the patient experienced unacceptable tolerability issues, a single down-titration of pregabalin was permissible, back to the previously tolerated dose (to a minimum dose of 150 mg/day).
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Baseline characteristics reporting groups
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Reporting group title |
Qutenza [Capsaicin (8%) high-concentration patch]
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
Qutenza [Capsaicin (8%) high-concentration patch]
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Reporting group description |
- | ||
Reporting group title |
Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Reporting group description |
- |
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End point title |
Proportion of patients who achieved ≥30% change in the “Average Pain for the Past 24 hours” Numeric Pain Rating Scale (NPRS) Score from Baseline to Week 8 (BOCF) (FAS) | |||||||||||||||
End point description |
The proportion of patients in each arm who achieved at least ≥30% change in the “average pain for the past 24 hours” Numeric Pain Rating Scale (NPRS) score from Week 2 (Day 8) to Week 8 (Day 57) was analyzed to compare the efficacy of Qutenza versus pregabalin in patients with Peripheral Neuropathic Pain (PNP). 'Baseline' refers to the mean of all NPRS “average pain for the past 24 hours” scores recorded during the screening period for 4 consecutive days. Week 8 Baseline-Observation Carried Forward (BOCF) refers to the mean of all “average pain for the past 24 hours” NPRS scores for the 7 days up to and including the Week 8 visit if non-missing and the Baseline value if missing assessment at Week 8.
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End point type |
Primary
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End point timeframe |
Week 2 (Day 8) and Week 8 (Day 57)
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Statistical analysis title |
Proportion of patients who achieved ≥ 30% change | |||||||||||||||
Statistical analysis description |
The analysis of the primary efficacy variable was performed using a Generalized Linear Model (GLM) with logit link function, the hypothesis was tested using Odds Ratio (OR) using the non-inferiority margin of -8.5%, which translated into a margin on the OR of 0.693. The null hypothesis of inferiority was therefore to be rejected if the 2-sided 95% Confidence Interval (CI) for the OR of Qutenza versus pregabalin fell completely above 0.693.
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Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
non-inferiority | |||||||||||||||
P-value |
= 0.86 | |||||||||||||||
Method |
Generalized Linear Model | |||||||||||||||
Parameter type |
Odds ratio (OR) | |||||||||||||||
Point estimate |
1.034
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Confidence interval |
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level |
95% | |||||||||||||||
sides |
2-sided
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lower limit |
0.715 | |||||||||||||||
upper limit |
1.496 |
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End point title |
Proportion of patients in each arm who achieved “optimal therapeutic effect” from Week 2 to Week 8 (FAS) | |||||||||||||||
End point description |
The key secondary efficacy endpoint was the proportion of patients who achieved optimal therapeutic effect defined as no change in chronic background pain medication (assessed by the Independent Data Review Board [IDRB]) and no discontinuation of study drug due to lack of efficacy or tolerability prior to Week 8 and at least 30% reduction in the “average pain for the past 24 hours” NPRS score, from Baseline to Week 8 and no moderate or severe Adverse Drug Reaction (ADRs) during the stable treatment period.
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End point type |
Secondary
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End point timeframe |
Week 2 (Day 8) to Week 8 (Day 57)
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Statistical analysis title |
Optimal therapeutic effect Week 8 BOCF | |||||||||||||||
Statistical analysis description |
The Generalized Linear Model (GLM) models optimal therapeutic effect dependent on treatment, countries [countries were pooled due to a small numbers of patients within the country] gender with logit linkage and binomial distribution. Baseline Observation Carried Forward (BOCF) and Full Analysis Set (FAS) was used for data analysis.
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Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [1] | |||||||||||||||
P-value |
= 0.064 | |||||||||||||||
Method |
t-test, 2-sided | |||||||||||||||
Parameter type |
Odds ratio (OR) | |||||||||||||||
Point estimate |
1.423
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Confidence interval |
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level |
95% | |||||||||||||||
sides |
2-sided
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lower limit |
0.979 | |||||||||||||||
upper limit |
2.066 | |||||||||||||||
Notes [1] - Generalized Linear Model |
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End point title |
Proportion of patients who achieved at least a 30% change in the “average pain for the past 24 hours" Numeric Pain Rating Scale (NPRS) score from Baseline to the mean of all scores recorded between Week 2 and Week 8 (FAS) | ||||||||||||||||||
End point description |
Proportion of patients who achieved at least a 30% decrease in the “average pain for the past 24 hours" Numeric Pain Rating Scale (NPRS) score from Baseline to the mean of all scores recorded between Week 2 and Week 8. BOCF: Baseline Observation Carried Forward and NC [Non-compliant].
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End point type |
Secondary
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End point timeframe |
Baseline to the mean of all scores recorded between Week 2 and Week 8 including complete 8 weeks of treatment.
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Statistical analysis title |
At least 30% Pain Change Achievement Week 8 | ||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [2] | ||||||||||||||||||
P-value |
= 0.303 | ||||||||||||||||||
Method |
Generalized Linear Model | ||||||||||||||||||
Parameter type |
Odds ratio (OR) | ||||||||||||||||||
Point estimate |
0.812
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Confidence interval |
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level |
95% | ||||||||||||||||||
sides |
2-sided
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lower limit |
0.547 | ||||||||||||||||||
upper limit |
1.206 | ||||||||||||||||||
Notes [2] - The GLM models optimal therapeutic effect dependent on treatment, country (pooled), gender with logit linkage and Binomial Distribution.The Odds Ratio (OR) compares Qutenza to pregabalin. |
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Statistical analysis title |
At least 30% Pain Change Achievement Week 8BOCF+NC | ||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [3] | ||||||||||||||||||
P-value |
= 0.98 | ||||||||||||||||||
Method |
Generalized Linear Model | ||||||||||||||||||
Parameter type |
Odds ratio (OR) | ||||||||||||||||||
Point estimate |
1.005
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Confidence interval |
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level |
95% | ||||||||||||||||||
sides |
2-sided
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lower limit |
0.695 | ||||||||||||||||||
upper limit |
1.452 | ||||||||||||||||||
Notes [3] - The GLM models optimal therapeutic effect dependent on treatment, country (pooled), gender with logit linkage and Binomial Distribution.The Odds Ratio compares Qutenza to pregabalin. |
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End point title |
Proportion of patients who achieved at least a 50% change in the “average pain for the 24 hours" Numeric Pain Rating Scale (NPRS) score from Baseline to Week 8 and from Baseline to the mean of all scores recorded between Week 2 and Week 8 (FAS) | |||||||||||||||||||||
End point description |
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End point type |
Secondary
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End point timeframe |
From Baseline to Week 8, and from Baseline to the mean of all scores recorded between Week 2 and Week 8 including proportion of patients in both arms who completed 8 weeks of treatment.
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Statistical analysis title |
At least 50% Pain Change Achievement Week 8 | |||||||||||||||||||||
Statistical analysis description |
Full Analysis Set (FAS) used for analysis.
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Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [4] | |||||||||||||||||||||
Method |
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Parameter type |
Difference in Proportion | |||||||||||||||||||||
Point estimate |
-2.9
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Confidence interval |
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level |
95% | |||||||||||||||||||||
sides |
2-sided
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lower limit |
-11.6 | |||||||||||||||||||||
upper limit |
5.8 | |||||||||||||||||||||
Notes [4] - The difference in proportion method was used to analyse large sample normal approximation and compare Qutenza to Pregabalin. |
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Statistical analysis title |
At least 50% Pain Reduction Achievement Week 8BOCF | |||||||||||||||||||||
Statistical analysis description |
Full Analysis Set (FAS) was used for analysis.
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Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [5] | |||||||||||||||||||||
Method |
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Parameter type |
Difference in Proportion | |||||||||||||||||||||
Point estimate |
2.2
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Confidence interval |
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level |
95% | |||||||||||||||||||||
sides |
2-sided
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lower limit |
-5.9 | |||||||||||||||||||||
upper limit |
10.3 | |||||||||||||||||||||
Notes [5] - The difference in proportion method was used to analyse large sample normal approximation and compare Qutenza to Pregabalin. |
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Statistical analysis title |
At Least 50% Reduction Achievement Week 2 to 8 | |||||||||||||||||||||
Statistical analysis description |
Full Analysis Set (FAS) was used for analysis.
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Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
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Number of subjects included in analysis |
559
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Analysis specification |
Pre-specified
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Analysis type |
other [6] | |||||||||||||||||||||
Method |
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Parameter type |
Difference in Proportion | |||||||||||||||||||||
Point estimate |
12.2
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Confidence interval |
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level |
95% | |||||||||||||||||||||
sides |
2-sided
|
|||||||||||||||||||||
lower limit |
4.8 | |||||||||||||||||||||
upper limit |
19.6 | |||||||||||||||||||||
Notes [6] - The difference in proportion method was used to analyse large sample normal approximation and compare Qutenza to Pregabalin. |
|
|||||||||||||||||||
End point title |
Absolute and percent change in “average pain for the past 24 hours” Numeric Pain Rating Scale (NPRS) score from Week 2 to Week 8 (FAS) | ||||||||||||||||||
End point description |
Full Analysis Set (FAS) was used for data analysis.
|
||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||
End point timeframe |
Mean of all scores from Week 2 (Day 8) to Week 8 (Day 57).
|
||||||||||||||||||
|
|||||||||||||||||||
Statistical analysis title |
Numeric Pain Rating Scale (NPRS) Absolute Change | ||||||||||||||||||
Statistical analysis description |
The LS mean and LS mean difference between Qutenza and pregabalin and its corresponding 95% CI are derived using an analysis of covariance (ANCOVA) model adjusted for gender, pooled country and baseline.
|
||||||||||||||||||
Comparison groups |
Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated] v Qutenza [Capsaicin (8%) high-concentration patch]
|
||||||||||||||||||
Number of subjects included in analysis |
557
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
-0.7
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
-0.9 | ||||||||||||||||||
upper limit |
-0.4 | ||||||||||||||||||
Statistical analysis title |
Numeric Pain Rating Scale (NPRS) Percent Change | ||||||||||||||||||
Statistical analysis description |
The LS mean and LS mean difference between Qutenza and pregabalin and its corresponding 95% CI are derived using an ANCOVA model adjusted for gender, pooled country and baseline.
|
||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||
Number of subjects included in analysis |
557
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
-9.3
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
-13.4 | ||||||||||||||||||
upper limit |
-5.2 |
|
||||||||||||||||||||||||||||
End point title |
Time to onset of pain relief (in days) as assessed by at least a 30% change in “average pain for the past 24 hours” Numeric Pain Rating Scale (NPRS) score (FAS) | |||||||||||||||||||||||||||
End point description |
Time to onset of pain relief was assessed using the analysis of the time to ≥ 30% change (for 3 consecutive days) in “average pain for the past 24 hours” NPRS score. Onset date of pain relief is the date of the first questionnaire recorded with a 30% change. The Time to Onset is derived as Onset Date - Baseline Date + 1 Day. Hazard ratio was estimated using a Cox Model with country (pooled), gender and "average pain for the last 24 hours" NPRS score at baseline as covariates.
|
|||||||||||||||||||||||||||
End point type |
Secondary
|
|||||||||||||||||||||||||||
End point timeframe |
Baseline, Week 1 (Day 7), Week 2 (Day 14), Week 4 (Day 29), Week 6 (Day 43), and Week 8 (Day 57) .
|
|||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||
Statistical analysis title |
Time to Onset of Pain Relief | |||||||||||||||||||||||||||
Statistical analysis description |
Time to onset of pain relief was assessed using the analysis of the time to ≥ 30% change (for 3 consecutive days) in “average pain for the past 24 hours” NPRS score. Time to onset of pain relief was provided by the Cox model, adjusted on country, gender and NPRS score at baseline.
|
|||||||||||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
|||||||||||||||||||||||||||
Number of subjects included in analysis |
559
|
|||||||||||||||||||||||||||
Analysis specification |
Pre-specified
|
|||||||||||||||||||||||||||
Analysis type |
other | |||||||||||||||||||||||||||
P-value |
< 0.0001 | |||||||||||||||||||||||||||
Method |
Regression, Cox | |||||||||||||||||||||||||||
Parameter type |
Hazard ratio (HR) | |||||||||||||||||||||||||||
Point estimate |
1.68
|
|||||||||||||||||||||||||||
Confidence interval |
||||||||||||||||||||||||||||
level |
95% | |||||||||||||||||||||||||||
sides |
2-sided
|
|||||||||||||||||||||||||||
lower limit |
1.35 | |||||||||||||||||||||||||||
upper limit |
2.08 |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||
End point title |
Overall patient status using Patient Global Impression of Change (PGIC) questionnaire at Week 4 and Week 8 (FAS) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
End point description |
Difference between Qutenza and pregabalin for counts by category were completed using a Cochran-Mantel-Haenszel test. The Patient Global Impression of Change (PGIC) scores ranged from 1 = Very Much Improved to 7 = Very Much Worse. Full Analysis Set (FAS) was used for data analysis and Last Observation Carried Forward (LOCF) imputation was used.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||
End point timeframe |
Week 4 and Week 8 End of Study (LOCF)
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||
End point title |
Change in the Medical Outcomes Study (MOS) 6-item Cognitive Functioning Scale from Baseline to Week 8 (FAS) | ||||||||||||||||||
End point description |
The MOS Cognitive Functioning Scale is a patient reported outcome instrument which measures a range of less severe, day-to-day problems in 6 aspects of cognitive functioning,
including reasoning, concentration and thinking, confusion, memory, attention and psychomotor.The MOS 6-item Cognitive Functioning Scale absolute values are presented by treatment arm for the FAS.
|
||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||
End point timeframe |
Baseline to Week 8
|
||||||||||||||||||
|
|||||||||||||||||||
Statistical analysis title |
Percent Change (MOS) Cognitive Function | ||||||||||||||||||
Comparison groups |
Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated] v Qutenza [Capsaicin (8%) high-concentration patch]
|
||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
8.8
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
2.5 | ||||||||||||||||||
upper limit |
15.1 | ||||||||||||||||||
Statistical analysis title |
Absolute Change (MOS) Cognitive Function | ||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
4.3
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
2.9 | ||||||||||||||||||
upper limit |
5.7 |
|
|||||||||||||||||||||||||||||||
End point title |
Medical Outcomes Study (MOS) – Sleep Scale from Baseline to Week 4 and Week 8 (FAS) | ||||||||||||||||||||||||||||||
End point description |
Disturbed sleep is prevalent in people with chronic pain, and its assessment is also important in chronic pain trials. The MOS Sleep Scale measures 6 dimensions of sleep, including
initiation, maintenance (e.g., staying asleep), quantity, adequacy, somnolence (e.g.,drowsiness) and respiratory impairments (e.g., shortness of breath, snoring). Disturbed sleep has a major impact on Quality of Life (QoL) and is often a common symptom of many other chronic conditions, such as neuropathic pain. The reliability and validity of the MOS Sleep Scale have been evaluated in a number of disease areas, including neuropathic pain. Patients completed the MOS Sleep Scale at Baseline Visit, Week 4 Visit (Visit 4) and End of Treatment (EOT).
|
||||||||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||||||||
End point timeframe |
Baseline to Weeks 4 and 8
|
||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||
End point title |
Change in the Euroqol-5 dimensions (EQ-5D-5L) total score from Baseline to Week 8 (FAS) | ||||||||||||||||||
End point description |
The EQ-5D-5L was used as a measure of respondents’ Health-related quality of life (HRQoL) and health status. The EQ-5D-5L provides a simple descriptive profile and a single index value for health status. The EQ-5D-5L patient-rated questionnaire includes a visual analog scale (VAS), which records the respondent's patient-rated health status on a graduated scale (0 to 100), with higher scores for higher HRQoL. It also includes the EQ-5D-5L descriptive system, which comprises 5 dimensions of health: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. The responses record 5 levels of severity (i.e., no problems/slight problems/moderate problems/severe problems/extreme problems) within a particular EQ-5D dimension.
|
||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||
End point timeframe |
Baseline and Week 8 /EoS (BOCF).
|
||||||||||||||||||
|
|||||||||||||||||||
Statistical analysis title |
Percent Change from Baseline (HRQoL) EQ-5D-5L | ||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
11.5
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
3.9 | ||||||||||||||||||
upper limit |
19.2 | ||||||||||||||||||
Statistical analysis title |
Absolute Change from Baseline (HRQoL) EQ-5D | ||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||
Analysis type |
other | ||||||||||||||||||
Method |
|||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||
Point estimate |
3.1
|
||||||||||||||||||
Confidence interval |
|||||||||||||||||||
level |
95% | ||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||
lower limit |
0.3 | ||||||||||||||||||
upper limit |
5.9 |
|
|||||||||||||||||||||||||||||||||||||
End point title |
Treatment Satisfaction for Medication (FAS) | ||||||||||||||||||||||||||||||||||||
End point description |
Endpoint was assessed by TSQM evaluating proportion of patients who discontinued study drug or withdrew due to lack of efficacy or tolerability, or their willingness to continue treatment. The LS mean and LS difference of means between Qutenza and pregabalin and corresponding 95% CI were derived using an ANCOVA model adjusted for gender and pooled country. Factor Score = [(Sum of Obtained Score - Sum of Lowest Possible Score)/ Possible Sum Score Range] x 100, ranging from 0 to 100.
|
||||||||||||||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||||||||||||||
End point timeframe |
Week 8 and Week 12
|
||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||
End point title |
Time to reach optimal maintenance dose for Pregabalin (Days) (FAS) [7] | ||||||||||||||||||
End point description |
Patients who withdrew before reaching the maintenance dose were censored at their last available visit date. The time to optimal maintenance dose was derived as the date when Optimal Maintenance Dose was reached - Baseline Date + 1 Day. Optimal Maintenance Dose is defined as the last dose collected and Date Optimal Maintenance Dose reached is the start of the Interval of the Optimal Maintenance Dose.
|
||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||
End point timeframe |
VIsit (Week 1; [Days: 7]), (Week 2; [Days: 14]), (Week 4 [Days 29]), (Week 6 [Days 43]),(Week 8 [Days 57])
|
||||||||||||||||||
Notes [7] - The end point is not reporting statistics for all the arms in the baseline period. It is expected all the baseline period arms will be reported on when providing values for an end point on the baseline period. Justification: The endpoint measures optimal maintenance dose for pregabalin only, which is why qutenza arm was excluded from the statistics report for this endpoint. |
|||||||||||||||||||
|
|||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||||||||||||||||||||||||||
End point title |
Resource use (number of contacts with health professionals) | ||||||||||||||||||||||||||||||||||||||||||
End point description |
Details of healthcare resource use (number of contacts with a healthcare professional both related to neuropathic pain and for other causes) were collected at each visit during the study.
|
||||||||||||||||||||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||||||||||||||||||||
End point timeframe |
Baseline to End of Treatment [EOT}
|
||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||||||||||||||
End point title |
Tolerability (FAS) | ||||||||||||||||||||||||||||||
End point description |
The tolerability of treatment was assessed using Adverse Drug Reaction (ADRs) reported by patients in each arm. To increase the sensitivity of Adverse Events (AEs) collection and to limit recall bias on behalf of the patient, patients were asked to assess tolerability between visits, via self-report. In a patient reported outcome, terms such as “adverse event” were not appropriate. Instead, patients were asked open questions as to whether they have any health-related concerns or complaints and the number of complaints. Patients were asked to rate severity as follows; Mild (You could perform your normal daily activities), Moderate (You were limited in performing your normal daily activities) and Severe (You were not able to perform your daily activities).
|
||||||||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||||||||
End point timeframe |
Baseline to End of Treatment [EOT]
|
||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||
No statistical analyses for this end point |
|
|||||||||||||||||||||||||
End point title |
Change in intensity and area of allodynia from Baseline to Week 8 | ||||||||||||||||||||||||
End point description |
The area(s) of dynamic mechanical allodynia was mapped with the patient in a comfortable position, as for assessment of the painful area. The intensity of pain associated with the allodynia was rated by the patient using a numeric rating scale.
|
||||||||||||||||||||||||
End point type |
Secondary
|
||||||||||||||||||||||||
End point timeframe |
Baseline to End of Treatment (EOT)
|
||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Statistical analysis title |
Intensity Absolute change from Baseline | ||||||||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||||||||
Analysis type |
other | ||||||||||||||||||||||||
Method |
|||||||||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||||||||
Point estimate |
-0.6
|
||||||||||||||||||||||||
Confidence interval |
|||||||||||||||||||||||||
level |
95% | ||||||||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||||||||
lower limit |
-0.9 | ||||||||||||||||||||||||
upper limit |
-0.2 | ||||||||||||||||||||||||
Statistical analysis title |
Intensity Percent change from Baseline | ||||||||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||||||||
Analysis type |
other | ||||||||||||||||||||||||
Method |
|||||||||||||||||||||||||
Parameter type |
LS Mean Difference) | ||||||||||||||||||||||||
Point estimate |
-10.4
|
||||||||||||||||||||||||
Confidence interval |
|||||||||||||||||||||||||
level |
95% | ||||||||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||||||||
lower limit |
-17.2 | ||||||||||||||||||||||||
upper limit |
-3.5 | ||||||||||||||||||||||||
Statistical analysis title |
Area (cm2) Absolute change from Baseline | ||||||||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||||||||
Analysis type |
other | ||||||||||||||||||||||||
Method |
|||||||||||||||||||||||||
Parameter type |
LS Mean Difference) | ||||||||||||||||||||||||
Point estimate |
-30.1
|
||||||||||||||||||||||||
Confidence interval |
|||||||||||||||||||||||||
level |
95% | ||||||||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||||||||
lower limit |
-57.5 | ||||||||||||||||||||||||
upper limit |
-2.7 | ||||||||||||||||||||||||
Statistical analysis title |
Area (cm2) Percent change from Baseline | ||||||||||||||||||||||||
Comparison groups |
Qutenza [Capsaicin (8%) high-concentration patch] v Pregabalin [Oral Hard 75 mg Capsule Up-titrated as tolerated]
|
||||||||||||||||||||||||
Number of subjects included in analysis |
559
|
||||||||||||||||||||||||
Analysis specification |
Pre-specified
|
||||||||||||||||||||||||
Analysis type |
other | ||||||||||||||||||||||||
Method |
|||||||||||||||||||||||||
Parameter type |
LS Mean Difference | ||||||||||||||||||||||||
Point estimate |
-10.7
|
||||||||||||||||||||||||
Confidence interval |
|||||||||||||||||||||||||
level |
95% | ||||||||||||||||||||||||
sides |
2-sided
|
||||||||||||||||||||||||
lower limit |
-24.3 | ||||||||||||||||||||||||
upper limit |
2.9 |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Adverse events information
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Timeframe for reporting adverse events |
Timeframe for Treatment-Emergent Adverse Event (TEAE) was up to 30 days following the last treatment (follow-up window).
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Adverse event reporting additional description |
All safety analyses was conducted on the Safety Analysis Set (SAF) data, and it included all patients who have received the study drug.
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Assessment type |
Systematic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
|
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Dictionary name |
MedDRA | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
13.1
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Reporting groups
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Reporting group title |
Pregabalin [oral hard 75 mg capsules]
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Qutenza [Capsaicin (8%) high-concentration patch]
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Reporting group description |
- | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Frequency threshold for reporting non-serious adverse events: 5% | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Substantial protocol amendments (globally) |
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Were there any global substantial amendments to the protocol? Yes | |||
Date |
Amendment |
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15 Jun 2012 |
The first amendment was the only substantial amendment, prior to the study initiation date, which detailed:
● Revision of the primary endpoint
● Introduction of an Independent Data Review Board (IDRB)
● Definition of clinically significant change in pregabalin dosing between Week 5 and Week 8
● Definition of clinically significant change in QUTENZA dosing
● Assessment of allodynia at the Screening Visit
● Addition of an “Identification of Painful Area(s)” at Visit 5 (Week 8/EoS Visit)
● Permitted concomitant medications
● A clarification within the AE section that detailed that “Lack of efficacy” was not to be recorded as an AE
● A change to the pregabalin capsule count (to be collected on paper diary rather than electronic diary)
● The discontinuation of pregabalin
● A correction of the MOS Cog Scale, MOS Sleep Scale and NPRS versions
● A correction of NPRS pain score recording time for patients within the QUTENZA arm
● Minor administrative changes and change of study manager. |
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Interruptions (globally) |
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Were there any global interruptions to the trial? No | |||
Limitations and caveats |
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Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data. | |||
None reported |