These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Application of the equivalence test for analytical method transfers: testing precision using the United States Pharmacopoeia concept (1010).
    Author: Schepers U, Wätzig H.
    Journal: J Pharm Biomed Anal; 2006 Apr 11; 41(1):290-2. PubMed ID: 16338114.
    Abstract:
    In this work, the performance of the USP (1010) concept for comparing precision has been investigated. A diagram has been constructed to relate common variance ratios, sample sizes and the corresponding powers. The choice of the upper acceptable limit of variance ratios strongly influences the power. Small upper limits, such as 2.25, are not practical. The proposed upper limit of 4 requires sample sizes of 14 or higher to achieve a power of 80%. If the precision of a method is very good, higher ratios seem to be acceptable, with a significant reduction in measurements. For example, using n = 6 is sufficient to obtain a power of 90%, if the variances are in fact the same and the acceptable variance ratio is 16.
    [Abstract] [Full Text] [Related] [New Search]