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Accuracy and Reliability of Urine Drug Tests

NCJ Number
116375
Journal
University of Kansas Law Review Volume: 36 Issue: 4 Dated: (Summer 1988) Pages: 640-681
Author(s)
L Miike; M Hewitt
Date Published
1988
Length
42 pages
Annotation
The use of urinalysis for screening for drug use is examined in terms of the tests available, their accuracy and reliability, and issues to consider when deciding whether and how to implement a drug screening program.
Abstract
Current tests can detect almost all drugs or their metabolites. The tests commonly used in urine screening programs are based on immunoassays or thin-layer chromatography. Screening tests are not definitive, however. Confirmatory tests are necessary to distinguish between positive results due to the drug's presence in the urine specimen, positive results due to cross-reactivity of the test with other substances in the urine specimen, or to testing errors. The tests all have intrinsic limitations, and errors are inevitable. Properly performed tests are especially crucial in mass screening programs, where the chance for error is greater and where even a small error rate will represent large numbers of people. Hair analysis may soon emerge as a new screening technology. Costs and cost-effectiveness are important factors to consider in deciding whether to institute a drug screening program. In addition, information on the technical capabilities and limitations of urine drug tests can be of assistance in evaluating the reasonableness of a mandatory drug testing program in the workplace. 50 footnotes and appended charts.

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