Efficient model-based bioequivalence testing

Biostatistics
Kathrin MöllenhoffHolger Dette

Abstract

The classical approach to analyze pharmacokinetic (PK) data in bioequivalence studies aiming to compare two different formulations is to perform noncompartmental analysis (NCA) followed by two one-sided tests (TOST). In this regard, the PK parameters area under the curve (AUC) and $C_{\max}$ are obtained for both treatment groups and their geometric mean ratios are considered. According to current guidelines by the U.S. Food and Drug Administration and the European Medicines Agency, the formulations are declared to be sufficiently similar if the $90\%$ confidence interval for these ratios falls between $0.8$ and $1.25 $. As NCA is not a reliable approach in case of sparse designs, a model-based alternative has already been proposed for the estimation of $\rm AUC$ and $C_{\max}$ using nonlinear mixed effects models. Here we propose another, more powerful test than the TOST and demonstrate its superiority through a simulation study both for NCA and model-based approaches. For products with high variability on PK parameters, this method appears to have closer type I errors to the conventionally accepted significance level of $0.05$, suggesting its potential use in situations where conventional bioequivalence analysis is not applic...Continue Reading

References

Apr 1, 1990·Journal of Pharmacokinetics and Biopharmaceutics·K F Phillips
Mar 1, 1997·Journal of Biopharmaceutical Statistics·L F LaceyA Bye
Jan 15, 2000·Statistical Methods in Medical Research·L Sheiner, J Wakefield
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Oct 7, 2009·The AAPS Journal·Kamal K Midha, Gordon McKay
Dec 30, 2011·Clinical Pharmacology and Therapeutics·A DuboisF Mentré

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