|
|
||||||||
Clinical Chemistry, Vol 36, 1736-1740, Copyright © 1990 by American Association for Clinical Chemistry
SS Ehrmeyer, RH Laessig, JE Leinweber and JJ Oryall
Department of Pathology and Laboratory Medicine, University of Wisconsin, Madison 53706.
On March 14, 1990, the Centers for Disease Control and the Health Care Financing Administration published criteria for defining minimum performance in proficiency testing (PT). Using our previously described computer modeling technique, we determined the likelihood of passing PT under the new rules. The model relates combinations of intralaboratory CV and bias to PT performance criteria. For example, a laboratory with a bias of zero and an internal CV of 5% will pass a 10% fixed-limit PT criterion (i.e., the criterion for glucose analyses) 98% of the time when five samples are used. The model provides similar analyses for all PT criteria and all relevant combinations of CV and bias. The probability of passing PT decreases as the number of analytes tested increases, i.e., from 98% to 37% as the number of analytes increases from 1 to 20. A laboratory's internal CV has a greater effect on the outcome of PT than do the corresponding bias values. We conclude that a laboratory that operates with methods that have internal CVs less than or equal to 33% and biases less than or equal to 20% of the PT criteria will have a greater than 99% chance of passing PT.
The following articles in journals at HighWire Press have cited this article:
![]() |
J. Mahoney and J. Ellison Assessing the Quality of Glucose Monitor Studies: A Critical Evaluation of Published Reports Clin. Chem., June 1, 2007; 53(6): 1122 - 1128. [Abstract] [Full Text] [PDF] |
||||
![]() |
G. F. Billman, A. B. Hughes, G. G. Dudell, E. Waldman, L. M. Adcock, D. M. Hall, E. N. Orsini Jr, A. J. Koska, L. J. Van Marter, N. N. Finer, et al. Clinical Performance of an In-Line, ex Vivo Point-of-Care Monitor: A Multicenter Study Clin. Chem., November 1, 2002; 48(11): 2030 - 2043. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. A. Widness, J. C. Kulhavy, K. J. Johnson, G. A. Cress, I. J. Kromer, M. J. Acarregui, and R. D. Feld Clinical Performance of an In-Line Point-of-Care Monitor in Neonates Pediatrics, September 1, 2000; 106(3): 497 - 504. [Abstract] [Full Text] |
||||
![]() |
R. W. Jenny and K. Y. Jackson-Tarentino Causes of Unsatisfactory Performance in Proficiency Testing Clin. Chem., January 1, 2000; 46(1): 89 - 99. [Abstract] [Full Text] [PDF] |
||||
![]() |
J. Lindemans, P. Hoefkens, A. L. van Kessel, M. Bonnay, W. R. Kulpmann, and J. D.E. van Suijlen Portable Blood Gas and Electrolyte Analyzer Evaluated in a Multiinstitutional Study Clin. Chem., January 1, 1999; 45(1): 111 - 117. [Abstract] [Full Text] [PDF] |
||||
![]() |
P. H. Petersen, D. Stockl, O. Blaabjerg, B. Pedersen, E. Birkemose, L. Thienpont, J. F. Lassen, and J. Kjeldsen Graphical interpretation of analytical data from comparison of a field method with a Reference Method by use of difference plots Clin. Chem., November 1, 1997; 43(11): 2039 - 2046. [Abstract] [Full Text] [PDF] |
||||
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |