Clinical Trial Results:
A Phase III, Multicenter, Randomized, Double-Blind, Placebo-Controlled Clinical Trial to Study the Safety and Efficacy of the Addition of Sitagliptin During Metformin Up-titration Compared with Metformin Up-titration Alone in Subjects with Type 2 Diabetes Mellitus
Summary
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EudraCT number |
2015-004224-59 |
Trial protocol |
CZ |
Global end of trial date |
01 Feb 2018
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Results information
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Results version number |
v1(current) |
This version publication date |
14 Feb 2019
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First version publication date |
14 Feb 2019
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Other versions |
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 |
0431-848
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT02791490 | ||
WHO universal trial number (UTN) |
- | ||
Other trial identifiers |
Merck Protocol Number: MK-0431-848 | ||
Sponsors
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Sponsor organisation name |
Merck Sharp & Dohme Corp.
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Sponsor organisation address |
2000 Galloping Hill Road, Kenilworth, NJ, United States, 07033
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Public contact |
Clinical Trials Disclosure, Merck Sharp & Dohme Corp., ClinicalTrialsDisclosure@merck.com
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Scientific contact |
Senior Vice President, Global Clinical Development, Merck Sharp & Dohme Corp., ClinicalTrialsDisclosure@merck.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 |
01 Feb 2018
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Is this the analysis of the primary completion data? |
No
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Global end of trial reached? |
Yes
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Global end of trial date |
01 Feb 2018
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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 |
This trial is designed to evaluate, in adult participants with Type 2 diabetes mellitus and inadequate glycemic control on sub-maximal metformin mono-therapy (1000 mg/day), the effect of up-titration of metformin plus the addition of sitagliptin compared to up-titration of metformin alone on glycemic control. The primary hypothesis of this study is that up-titration of metformin to 2000 mg/day (1000 mg, twice daily [b.i.d]) plus the addition of sitagliptin 100 mg/day provides greater reduction in hemoglobin A1C (A1C) compared to metformin up-titration alone. Another primary objective of this study is to evaluate the safety and tolerability of this treatment.
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Protection of trial subjects |
This study was conducted in conformance with Good Clinical Practice standards and applicable country and/or local statutes and regulations regarding ethical committee review, informed consent, and the protection of human subjects participating in biomedical research.
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Background therapy |
Metformin is a well-established treatment for individuals with Type 2 diabetes mellitus which has been used in Europe for ~40 years and in the United States since 1995. Sitagliptin is an orally active and highly-selective dipeptidyl peptidase intravenous (IV) (DPP- 4) inhibitor indicated for the treatment of individuals with Type 2 diabetes mellitus. | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
16 Jun 2016
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Long term follow-up planned |
No
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Independent data monitoring committee (IDMC) involvement? |
No
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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 |
Argentina: 53
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Country: Number of subjects enrolled |
Brazil: 59
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Country: Number of subjects enrolled |
Canada: 18
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Country: Number of subjects enrolled |
Czech Republic: 11
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Country: Number of subjects enrolled |
Guatemala: 73
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Country: Number of subjects enrolled |
Mexico: 85
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Country: Number of subjects enrolled |
Russian Federation: 80
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Country: Number of subjects enrolled |
United States: 79
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Worldwide total number of subjects |
458
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EEA total number of subjects |
11
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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) |
365
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From 65 to 84 years |
91
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85 years and over |
2
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Recruitment
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Recruitment details |
- | ||||||||||||||||||
Pre-assignment
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Screening details |
This trial included male and female adult participants with Type 2 diabetes mellitus and inadequate glycemic control on sub-maximal metformin mono-therapy. Additional criteria applied. | ||||||||||||||||||
Period 1
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Period 1 title |
Overall Study (overall period)
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Is this the baseline period? |
Yes | ||||||||||||||||||
Allocation method |
Randomised - controlled
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Blinding used |
Double blind | ||||||||||||||||||
Roles blinded |
Subject, Investigator | ||||||||||||||||||
Arms
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Are arms mutually exclusive |
Yes
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Arm title
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Sitagliptin | ||||||||||||||||||
Arm description |
Participants received sitagliptin 100 mg once daily for 20 weeks. They also received immediate-release metformin (Met-IR), which was titrated from a baseline dose of 1000 mg/day (500 mg/twice a day [b.i.d]) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||||||||||||||||||
Arm type |
Experimental | ||||||||||||||||||
Investigational medicinal product name |
Sitagliptin
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
Sitagliptin 100 mg once a day for 20 weeks.
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Investigational medicinal product name |
Metformin
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
Immediate-release metformin (Met-IR) titrated from a baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15 and continued at that dose for remainder of treatment period.
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Arm title
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Placebo | ||||||||||||||||||
Arm description |
Participants received placebo matching sitagliptin once daily for 20 weeks. They also received Met-IR, which was titrated from baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||||||||||||||||||
Arm type |
Placebo | ||||||||||||||||||
Investigational medicinal product name |
Metformin
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
Immediate-release metformin (Met-IR) titrated from a baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15 and continued at that dose for remainder of treatment period.
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Investigational medicinal product name |
Placebo
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Tablet
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Routes of administration |
Oral use
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Dosage and administration details |
Matching placebo to sitagliptin 100 mg once a day for 20 weeks.
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Baseline characteristics reporting groups
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Reporting group title |
Sitagliptin
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Reporting group description |
Participants received sitagliptin 100 mg once daily for 20 weeks. They also received immediate-release metformin (Met-IR), which was titrated from a baseline dose of 1000 mg/day (500 mg/twice a day [b.i.d]) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Placebo
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Reporting group description |
Participants received placebo matching sitagliptin once daily for 20 weeks. They also received Met-IR, which was titrated from baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
Sitagliptin
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Reporting group description |
Participants received sitagliptin 100 mg once daily for 20 weeks. They also received immediate-release metformin (Met-IR), which was titrated from a baseline dose of 1000 mg/day (500 mg/twice a day [b.i.d]) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||
Reporting group title |
Placebo
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Reporting group description |
Participants received placebo matching sitagliptin once daily for 20 weeks. They also received Met-IR, which was titrated from baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | ||
Subject analysis set title |
Sitagliptin
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Subject analysis set type |
Full analysis | ||
Subject analysis set description |
Participants received sitagliptin 100 mg once daily for 20 weeks. They also received Met-IR, which was titrated from a baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed.
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Subject analysis set title |
Placebo
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Subject analysis set type |
Full analysis | ||
Subject analysis set description |
Participants received placebo matching sitagliptin once daily for 20 weeks. They also
received Met-IR, which was titrated from baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed.
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End point title |
Change From Baseline in Hemoglobin A1C at Week 20 | ||||||||||||
End point description |
Hemoglobin A1C is a blood marker used to report average blood glucose levels over prolonged periods of time. Percentage A1C is the ratio of glycated hemoglobin to total hemoglobin x 100. The change from baseline represents the Week 20 A1C value minus the Week 0 (baseline) A1C value. The population analyzed included all randomized participants who received at least 1 dose of study medication and had at least 1 observation for the analysis end point.
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End point type |
Primary
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End point timeframe |
Baseline and Week 20
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Statistical analysis title |
Change from Baseline in Hemoglobin A1C at Week 20 | ||||||||||||
Comparison groups |
Placebo v Sitagliptin
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Number of subjects included in analysis |
458
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Analysis specification |
Pre-specified
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Analysis type |
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P-value |
< 0.001 | ||||||||||||
Method |
Longitudinal Data Analysis | ||||||||||||
Parameter type |
Difference in Least Squares Means | ||||||||||||
Point estimate |
-0.41
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
-0.59 | ||||||||||||
upper limit |
-0.23 |
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End point title |
Percentage of Participants Who Experienced at Least One Adverse Event (AE) | ||||||||||||
End point description |
An adverse event (AE) is any untoward medical occurrence in a study participant administered a pharmaceutical product that does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not related to the medicinal product. The population analyzed for this end point included all randomized participants who received at least 1 dose of study medication.
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End point type |
Primary
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End point timeframe |
Up to 22 weeks
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Statistical analysis title |
Pct of part. who experienced at least one AE | ||||||||||||
Comparison groups |
Sitagliptin v Placebo
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Number of subjects included in analysis |
458
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Analysis specification |
Pre-specified
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Analysis type |
other | ||||||||||||
Method |
Miettinen and Nurminen method | ||||||||||||
Parameter type |
Difference in % vs Placebo | ||||||||||||
Point estimate |
-1.7
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
-10.8 | ||||||||||||
upper limit |
7.4 |
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End point title |
Percentage of Participants Who Discontinued Study Drug Due to an Adverse Event [1] | ||||||||||||
End point description |
An adverse event (AE) is any untoward medical occurrence in a study participant administered a pharmaceutical product that does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether or not related to the medicinal product. The population analyzed for this end point included all randomized participants who received at least 1 dose of study medication.
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End point type |
Primary
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End point timeframe |
Up to 20 weeks
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Notes [1] - No statistical analyses have been specified for this primary end point. It is expected there is at least one statistical analysis for each primary end point. Justification: No between-group statistical comparison was provided for this primary end point because the statistical analysis plan called for between-group comparisons for only those safety endpoints reported by at least 4 participants in one or both treatment groups. |
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No statistical analyses for this end point |
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End point title |
Percentage of Participants With Hemoglobin A1C <7% at Week 20 | ||||||||||||
End point description |
Hemoglobin A1C is a blood marker used to report average blood glucose levels over prolonged periods of time. Percentage A1C is the ratio of glycated hemoglobin to total hemoglobin x 100. The population analyzed included all randomized participants who received at least 1 dose of study medication and had at least 1 observation for the analysis end point.
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End point type |
Secondary
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End point timeframe |
Week 20
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Statistical analysis title |
Pct of Participants with A1C<7% at Wk 20 | ||||||||||||
Comparison groups |
Sitagliptin v Placebo
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Number of subjects included in analysis |
458
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.002 | ||||||||||||
Method |
Miettinen and Nurminen method | ||||||||||||
Parameter type |
Relative Risk | ||||||||||||
Point estimate |
1.7
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
1.2 | ||||||||||||
upper limit |
2.5 |
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End point title |
Change from Baseline in Fasting Plasma Glucose (FPG) at Week 20 | ||||||||||||
End point description |
Plasma glucose was measured on a fasting basis and is expressed as mg/dL. Blood was drawn predose on Day 1 and after 20 weeks of treatment to determine change in FPG levels. The change from baseline represents the Week 20 FPG value minus the Week 0 (baseline) FPG value. The population analyzed included all randomized participants who received at least 1 dose of study medication and had at least 1 observation for the analysis end point.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 20
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Statistical analysis title |
Chg from Baseline in FPG at Week 20 | ||||||||||||
Comparison groups |
Sitagliptin v Placebo
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Number of subjects included in analysis |
458
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Analysis specification |
Pre-specified
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Analysis type |
superiority | ||||||||||||
P-value |
= 0.002 | ||||||||||||
Method |
Longitudinal Data Analysis | ||||||||||||
Parameter type |
Difference in Least Squares Means | ||||||||||||
Point estimate |
-12.4
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
-20.2 | ||||||||||||
upper limit |
-4.6 |
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End point title |
Percentage of Participants With Hemoglobin A1C ≥8.5% at Baseline That Attained A1C Goal of <7% at Week 20 | ||||||||||||
End point description |
Hemoglobin A1C is a blood marker used to report average blood glucose levels over prolonged periods of time. Percentage A1C is the ratio of glycated hemoglobin to total hemoglobin x 100. The population analyzed included the subgroup of randomized participants who had a baseline hemoglobin A1C ≥8.5%, received at least 1 dose of study medication, and had at least 1 observation for the analysis endpoint.
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End point type |
Secondary
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End point timeframe |
Baseline and Week 20
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No statistical analyses for this end point |
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End point title |
Percentage of Participants Receiving Glycemic Rescue Therapy | ||||||||||||
End point description |
Participants who met pre-specified criteria for glycemic rescue received appropriate rescue therapy. The choice of anti-hyperglycemic rescue agent, dose, and regimen was directed by the investigator, as clinically appropriate. The population analyzed included all randomized participants who received at least 1 dose of study medication.
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End point type |
Secondary
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End point timeframe |
Up to 20 weeks
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No statistical analyses for this end point |
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Adverse events information
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Timeframe for reporting adverse events |
Up to 22 weeks
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Adverse event reporting additional description |
All randomized participants who received at least 1 dose of study medication
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Assessment type |
Systematic | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
MedDRA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
20.1
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Reporting groups
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Reporting group title |
Placebo
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Reporting group description |
Participants received placebo matching sitagliptin once daily for 20 weeks. They also received Met-IR, which was titrated from baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Sitagliptin
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Reporting group description |
Participants received sitagliptin 100 mg once daily for 20 weeks. They also received Met-IR, which was titrated from a baseline dose of 1000 mg/day (500 mg/b.i.d.) up to 2000 mg/day (1000 mg/b.i.d.) by Day 15. Participants also received glycemic rescue therapy as needed. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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? No | |||
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 |