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Testing equivalence between two laboratories or two methods using paired-sample analysis and interval hypothesis

Shixia Feng1, Qiwei Liang, Robin D Kinser

  • 1Philip Morris USA, Research Center, 4201 Commerce Road, Richmond, VA 23234, USA. shixia.feng@pmusa.com

Analytical and Bioanalytical Chemistry
|June 23, 2006
PubMed
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A new hypothesis testing method using paired samples improves equivalence testing between bioanalytical labs or methods. This approach reduces false positives, ensuring more reliable comparisons of laboratory or method performance.

Area of Science:

  • Bioanalytical Chemistry
  • Statistical Methodology
  • Method Validation

Background:

  • Equivalence testing is crucial for comparing bioanalytical laboratories and methods.
  • Traditional methods may be confounded by intersample variability, especially with diverse sample concentrations.
  • Reducing the risk of falsely concluding equivalence is essential for data integrity.

Purpose of the Study:

  • To introduce a modified interval hypothesis testing procedure for equivalence assessment.
  • To demonstrate its application in comparing bioanalytical laboratories and methods.
  • To highlight the advantages of paired-sample analysis in this context.

Main Methods:

  • Development of a modified interval hypothesis testing procedure.
  • Application of paired-sample analysis to reduce confounding by intersample variability.

Related Experiment Videos

  • Discussion of practical aspects: experimental design, sample size, and power estimation.

    • Main Results:

    • The proposed testing procedure effectively reduces the risk of wrongly concluding equivalence.
    • Paired-sample analysis proves less confounded by intersample variability compared to unpaired analysis.
    • The method is robust even with incurred biological samples across a wide concentration range.

    Conclusions:

    • The modified interval hypothesis testing procedure offers a more reliable approach for equivalence testing.
    • Paired-sample analysis is advantageous for bioanalytical method and laboratory comparisons.
    • The described methodology enhances the accuracy and reduces errors in equivalence assessments.