[Everyday quality control at clinical-biochemical laboratories using chi square test]

Abstract

The possibility of using chi 2 statistical test for quality control of laboratory studies was evaluated in a practical laboratory. In the overwhelming majority of cases the chi 2 test of analytical series, estimated from previous results or total sum of results of a month, indicates with certainty that this series is a random sampling. This unambiguously indicates analytical reliability of the results. Division of patients into inpatients and outpatients did not improve this parameter. The results were regularly much better for some analytical methods in comparison with other methods, which indicates their higher reliability.