Clinical Trial Results:
A phase 3b, multicenter, prospective, randomized, double blind, placebocontrolled study to reduce incidence of pre-dialysis hyperkalemia with Sodium Zirconium Cyclosilicate (DIALIZE)
Summary
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EudraCT number |
2017-003029-14 |
Trial protocol |
GB |
Global end of trial date |
07 Nov 2018
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Results information
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Results version number |
v1(current) |
This version publication date |
27 Nov 2019
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First version publication date |
27 Nov 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 |
D9480C00006
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Additional study identifiers
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ISRCTN number |
- | ||
US NCT number |
NCT03303521 | ||
WHO universal trial number (UTN) |
- | ||
Sponsors
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Sponsor organisation name |
AstraZeneca AB
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Sponsor organisation address |
151 85, Södertälje, Sweden,
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Public contact |
AstraZeneca Clinical, AstraZeneca, +1 877-240-9479, information.center@astrazeneca.com
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Scientific contact |
Global Clinical Lead, AstraZeneca, +1 877-240-9479, information.center@astrazeneca.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 |
07 Nov 2018
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Is this the analysis of the primary completion data? |
Yes
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Primary completion date |
07 Nov 2018
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Global end of trial reached? |
Yes
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Global end of trial date |
07 Nov 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 |
To evaluate the efficacy of SZC in the treatment of hyperkalaemia in patients on haemodialysis.
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Protection of trial subjects |
Patients given full and adequate oral and written information about the nature, purpose, possible risk and benefit of the study.
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Background therapy |
- | ||
Evidence for comparator |
- | ||
Actual start date of recruitment |
17 Dec 2017
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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 |
United Kingdom: 30
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Country: Number of subjects enrolled |
Japan: 56
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Country: Number of subjects enrolled |
Russian Federation: 66
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Country: Number of subjects enrolled |
United States: 44
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Worldwide total number of subjects |
196
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EEA total number of subjects |
30
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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) |
118
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From 65 to 84 years |
77
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85 years and over |
1
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Recruitment
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Recruitment details |
- | |||||||||||||||||||||||||||||||||
Pre-assignment
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Screening details |
The screening period ran for one week, beginning on a hemodialysis day following the Long Inter-Dialytic Interval (D -7) until the treatment period started on study day 1 (D1). Informed consent was obtained on study day -7 and patients were assessed to ensure they met the eligibility criteria during the screening period. | |||||||||||||||||||||||||||||||||
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, Monitor, Carer, Data analyst, Assessor | |||||||||||||||||||||||||||||||||
Arms
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Are arms mutually exclusive |
Yes
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Arm title
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Sodium Zirconium Cyclosilicate (SZC) | |||||||||||||||||||||||||||||||||
Arm description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | |||||||||||||||||||||||||||||||||
Arm type |
Experimental | |||||||||||||||||||||||||||||||||
Investigational medicinal product name |
Sodium zirconium cyclosilicate
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Investigational medicinal product code |
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Other name |
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Pharmaceutical forms |
Oral powder, Oral powder in sachet
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Routes of administration |
Oral use
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Dosage and administration details |
Powder for oral suspension in a sachet (5 g). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days
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Arm title
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Placebo | |||||||||||||||||||||||||||||||||
Arm description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | |||||||||||||||||||||||||||||||||
Arm type |
Placebo | |||||||||||||||||||||||||||||||||
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 |
Oral powder in sachet
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Routes of administration |
Oral use
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Dosage and administration details |
Powder for oral suspension in a sachet. Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days.
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Baseline characteristics reporting groups
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Reporting group title |
Sodium Zirconium Cyclosilicate (SZC)
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Placebo
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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End points reporting groups
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Reporting group title |
Sodium Zirconium Cyclosilicate (SZC)
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | ||
Reporting group title |
Placebo
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. |
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End point title |
Proportion of responders | ||||||||||||
End point description |
A subject was considered to be a responder if, during the evaluation period, they maintained a pre-dialysis serum potassium (S-K) between 4.0 and 5.0 mmol/L on at least 3 out of 4 dialysis treatments following the long inter-dialytic interval and did not receive rescue therapy. The S-K levels used for this analysis were based on the measurements obtained by the central laboratory.
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End point type |
Primary
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End point timeframe |
Evaluation period runs over the last 4 weeks of the treatment period, starting after visit 11 and ending on visit 15, thus it comprises post-long inter-dialytic interval visits 12, 13, 14 and 15.
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Statistical analysis title |
Primary Analysis | ||||||||||||
Statistical analysis description |
Proportion of responders
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Comparison groups |
Sodium Zirconium Cyclosilicate (SZC) v Placebo
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Number of subjects included in analysis |
196
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Analysis specification |
Pre-specified
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Analysis type |
other | ||||||||||||
P-value |
< 0.001 | ||||||||||||
Method |
Fisher exact | ||||||||||||
Parameter type |
Odds ratio (OR) | ||||||||||||
Point estimate |
68.77
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
10.85 | ||||||||||||
upper limit |
2810.85 |
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End point title |
Sensitivity analysis of the proportion of responders | ||||||||||||
End point description |
The sensitivity analysis assessed the impact of subjects classified as non-responders due to missing serum potassium (S-K) data. Missing values were imputed using available i-STAT measurements and last value carried forward approach. The Primary endpoint analysis was repeated on the imputed data.
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End point type |
Primary
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End point timeframe |
Evaluation period runs over the last 4 weeks of the treatment period, comprising post-long inter-dialytic interval visits 12, 13, 14 and 15.
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Statistical analysis title |
Primary analysis | ||||||||||||
Statistical analysis description |
Sensitivity analysis of the proportion of responders
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Comparison groups |
Sodium Zirconium Cyclosilicate (SZC) v Placebo
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Number of subjects included in analysis |
196
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Analysis specification |
Pre-specified
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Analysis type |
other | ||||||||||||
P-value |
< 0.001 | ||||||||||||
Method |
Fisher exact | ||||||||||||
Parameter type |
Odds ratio (OR) | ||||||||||||
Point estimate |
35.51
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Confidence interval |
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level |
95% | ||||||||||||
sides |
2-sided
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lower limit |
8.53 | ||||||||||||
upper limit |
309.48 |
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End point title |
Proportion of patients needing rescue therapy | ||||||||||||
End point description |
Patients requiring any urgent intervention consistent with local practice patterns to reduce serum potassium (S-K) including insulin/glucose, beta-adrenergic agonists, sodium bicarbonate, K binders or any form of renal replacement therapy.
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End point type |
Secondary
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End point timeframe |
An 8 week overall treatment period (a 4 week adjustment phase plus a 4 week evaluation phase).
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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 |
Adverse Events will be collected from time of randomization throughout the treatment period and including the follow-up period (until Visit 16 or the last patient visit in the study). SAEs will be recorded from the time of informed consent.
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Adverse event reporting additional description |
Safety Analysis Set (All randomized subjects who received at least 1 dose of investigational product, SZC or placebo. N=96 for SZC, N=99 for Placebo). Subjects excluded from the Safety Analysis Set (n=1 for SZC, n=0 Placebo) did not receive treatment.
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Assessment type |
Systematic | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary used for adverse event reporting
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Dictionary name |
MedDRA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Dictionary version |
21.0
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Reporting groups
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Reporting group title |
Placebo
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reporting group title |
Sodium Zirconium Cyclosilicate (SZC)
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Reporting group description |
Suspension administered orally for a treatment period of eight weeks (4 weeks of dose adjustment, 4 weeks in stable dose). Single dose contains 1 to 3 sachets that should be suspended in 45 mL of water by patient and administered on non-dialysis days. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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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28 Jul 2017 |
Stratification changed from site to country |
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11 Sep 2017 |
Cardiac monitoring/arrhythmia endpoint and related wording removed.
Visit schedule updated (Visit 14 and 16 removed).
Medications restrictions updated to reflect new information. |
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05 Feb 2018 |
Visit schedule updated (additional potassium sampling visits after Short InterDialytic Interval).
EOT/EOS requirements updated for premature treatment discontinuation.
Contraception and pregnancy restrictions updated to reflect EU guidelines.
Outcome measure for primary objective updated.
IDMC related wording added.
Eligibility criteria updated (EC #2 removed; IC #9 added; IC #7 and EC #6 clarified).
Patient dietary counseling and compliance with diet restrictions added.
Dialysis adequacy and Interdialytic Weight Gain assessment clarified.
Dosing instruction for Investigational Product updated.
The list of pH-dependent drugs updated.
EOS visit window updated.
Study requirements for safety assessments and rescue treatment clarified. |
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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 |