Statistical methodology
Statistical methods were described previously.10 It was
estimated that 45 randomized patients (30 alirocumab; placebo) would provide 95% power to detect a mean
percent change in LDL-C of ≥30% from baseline to 24
weeks with a 0.05 two-sided significance level, assuming
an SD of 25%. To accommodate a maximum estimated
subject drop-out rate of 30% (based on previous trials) at
52 weeks and to provide greater safety data to the
ODYSSEY Phase 3 program, the sample size was
increased to 306 patients.