Update on the statistical analysis of bioequivalence studies

Author(s): Hauschke, D.

Journal/Book: International Journal of Clinical Pharmacology, Therapy and Toxicology. 1992; 1: 45-50.

Abstract: Statistical methods to assess bioequivalence of a test and a reference formulation are reviewed with emphasis an the distribution of bioequivalence characteristics and the consumer risk of erroneously accepting bioequivalence. Among the procedures not exceeding a nominal consumer risk of 5%, the one with an acceptably sma11 producer risk of erroneously rejecting bioequivalence is selected. With the exception of tmax the following strategy is recommended: a decision in favour of bioequivalence is made if the shortest 90%confidence interval for the ratio of the expected medians is in the bioequivalence range for the chosen characteristics of rate and extent of absorption. If the assumption of a logarithmic normal distribution is not valid, the analogous nonparametric (distribution-free) 90%confidence interval, which is also based an the two-sample approach for the sequences reference/test and test/reference, is the procedure of choice. The issue of a modification of the bioequivalence range of 80-120% to other values for bioequivalence characteristics other than AUC (e. g. Cmax) is also addressed. Finally, a decision rule for tmax is presented.

Keyword(s): Bioequivalence

Zurück | Weiter