title: Bioequivalence and intrasubject variability.
abstract: Bioequivalence of the two formulations refers to the equivalence of the marginal distributions of the two formulations. Under normal assumptions, this would require the equivalence of both average and intrasubject variability of bioavailability. A procedure is introduced for the equivalence in intrasubject variability for bioavailability/bioequivalence studies with the standard two-by-two crossover design. It is shown that the confidence interval approach is operationally identical to the hypothesis testing in assessment of equivalence of intrasubject variability. A hypothetical data set from a two-by-two crossover bioequivalence study illustrates the procedure.
authors.affiliation: Berlex Laboratories, Inc., Wayne, New Jersey 07470.
authors.forename: J P
authors.initials: JP
authors.lastname: Liu
mesh_terms: D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001682:Biological Availability; D006801:Humans; D008954:Models, Biological; D015233:Models, Statistical; D016032:Randomized Controlled Trials as Topic / Q000379:methods / Q000706:statistics & numerical data; D013810:Therapeutic Equivalency
chemical_list: D000889:Anti-Arrhythmia Agents