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On Sample Size Calculation in Bioequivalence Trials

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Abstract

Sample size calculation plays an important role in bioequivalence trials. In practice, a bioequivalence study is usually conducted under a crossover design or a parallel design with raw data or log-transformed data. In this paper, we discuss the differences in sample size calculation between a crossover design and a parallel design with raw data or log-transformed data. Formulas for sample size calculation under a crossover design and a parallel design with raw data or log-transformed data are derived. A brief discussion for the relationship among these formulas is given.

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REFERENCES

  1. E. Diletti, D. Hauschke, and V. W. Steinijans. Sample size determination for bioequivalence assessment by means of confidence intervals. Int. J. Clin. Pharm. Ther. Toxicol. 19:1–8 (1991).

    Google Scholar 

  2. S. C. Chow and J. P. Liu. Design and Analysis of Clinical Trials. John Wiley & Sons, New York, 1998.

    Google Scholar 

  3. FDA. Guidance on Statistical Procedures for Bioequiυalence Studies Using a Standard Two-Treatment Crossoυer Design, Division of Bioequivalence, Office of Generic Drugs, Center for Drug Evaluation and Research, Food and Drug Administration, Rockville, MD, 1992.

    Google Scholar 

  4. FDA. Guidance for Industry: Bioaυailability and Bioequiυalence Studies for Orally Administered Drug Products—General Considerations. Center for Drug Evaluation and Research, Food and Drug Administration, Rockville, MD, 2000.

    Google Scholar 

  5. S. C. Chow and J. P. Liu. Design and Analysis of Bioaυailability and Bioequiυalence, Marcel Dekker New York, 1992.

    Google Scholar 

  6. S. C. Chow and J. P. Liu. Design and Analysis of Bioaυailability and Bioequiυalence Studies— Reυised and Expanded, 2nd ed., Marcel Dekker, New York, 1999.

    Google Scholar 

  7. Liu, J. P. and Chow, S. C. Sample size determination for the two one-sided tests procedure in bioequivalence. J. Pharmacokin. & Biopharm. 20:101–104 (1992).

    Google Scholar 

  8. K. W. Chen, G. Li, and S. C. Chow. A note on sample size determination for bioequivalence studies with high-order crossover designs. J. Pharmacokin. & Biopharm. 25:753–765 (1997).

    Google Scholar 

  9. FDA. Average, Population, and Individual Approaches to Establishing Bioequivalence. U.S. Department of Health and Human Services, Food and Drug Administration. Center for Drug Evaluation and Research (CDER), Rockville, MD, 1999.

    Google Scholar 

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Chow, SC., Wang, H. On Sample Size Calculation in Bioequivalence Trials. J Pharmacokinet Pharmacodyn 28, 155–169 (2001). https://doi.org/10.1023/A:1011503032353

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  • DOI: https://doi.org/10.1023/A:1011503032353

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