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At the end of the study, safety and efficacy outcome measures will be compared to determine a) if dosing with Generic Imiquimod cream, 5% is therapeutically equivalent to the currently marketed Aldara (imiquimod) cream, 5% and b) if both imiquimod 5% creams are superior in comparison to the Vehicle cream.
A nationwide, multicenter, double-blind, vehicle-controlled parallel group comparison study of a Generic Imiquimod cream, 5% (Actavis Mid-Atlantic LLC) and currently marketed Aldara (imiquimod) cream, 5% (distributed by Graceway Pharmaceuticals, LLC) was conducted in subjects with actinic keratoses (AKs) on the face and/or anterior scalp in order to evaluate the therapeutic equivalence of these two active treatments and to establish superiority of the efficacy of these two products over a Vehicle cream. Subjects were randomized to one of three treatment groups on a 2:2:1 basis as follows: (1) Generic Imiquimod cream, 5%, (2) Aldara (imiquimod) cream, 5%, and (3) Vehicle cream. The duration of treatment was 16 weeks (± 7 days).
The primary efficacy endpoint was the proportion of subjects in each treatment group with Complete Clearance (having no clinically visible actinic keratosis lesions in the 25 cm2 contiguous treatment area at the 8-week post-treatment visit) of AK lesions. The secondary efficacy endpoints were the Partial Clearance rates, defined as the proportion of subjects with at least a 75% reduction in the number of AK lesions counted at Baseline at the end-of-treatment visit (Week 16, EOT) and at the 8 weeks post-treatment visit/test-of-cure (Week 24, TOC), and the proportion of subjects with Complete Clearance of AK lesions at the end-of-treatment (Week 16, EOT) visit.
A 90% Wald's confidence interval with Yate's continuity correction was constructed around the difference between the proportions of subjects with Complete Clearance of AK lesions in the active treatments (Generic Imiquimod minus Aldara) to evaluate therapeutic equivalence in the primary efficacy analyses. Two-sided, continuity-corrected statistics were used to evaluate the superiority of each active treatment's Complete Clearance rate over that of the Vehicle treatment. The therapeutic comparability evaluations in the per-protocol (PP) population were considered primary while those in the intent-to-treat (ITT) population were considered supportive. The superiority comparisons in the ITT population were considered primary while those in the PP population were considered supportive. If the 90% confidence interval (CI) around the difference between the Generic Imiquimod and Aldara Complete Clearance rates in the PP population were contained within the interval 0.20 to +0.20, and each of these rates was greater than, and statistically different (p<0.05) from, the Vehicle rate in the ITT population, then Generic Imiquimod and Aldara were considered to be therapeutically equivalent.
Secondary efficacy analyses were conducted on the proportion of subjects in each treatment group with Complete Clearance of AK lesions at the Week 16, EOT visit as well as evaluation of the Partial Clearance of AK lesions at both the EOT and TOC visits. The results at both the EOT visit (Week 16) and those at 8 weeks post-treatment (Week 24, TOC) were statistically analyzed by the same methods described for the primary efficacy variable.
Both EOT and TOC analyses were conducted in the ITT population. The TOC analysis was conducted in the PP population and the EOT analysis was conducted in the EOT PP population.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Bio-equivalence Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Treatment
imiquimod, Aldara™, Vehicle Cream
Burke Pharmaceutical Research
Published on BioPortfolio: 2014-07-23T21:13:47-0400
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