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Assessing drug use prevalence in the workplace : a comparison of self-report methods and urinalysis . A random sample of 800 employees of a steel manufacturing company were randomly assigned to one of four self-report methods of assessing illicit drug use : 1 ) Individual interview in the workplace , 2 ) group-administered questionnaire in the workplace , 3 ) telephone interview , and 4 ) individual interview off the worksite . All 621 subjects participating in the research were also tested by urinalysis . Rates of drug use self-report were highest in the workplace interview condition and lowest in the overall group questionnaire condition . Although the overall prevalence rates produced by self-reports and urinalysis were similar , there was little concordance between urinalysis positives and self-report positives . The results indicated that self-reports and urinalysis are complementary methods of drug use assessment , and are best used in combination .
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Intervention_Educational
self-report methods
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Intervention_Educational
Individual interview in the workplace
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Intervention_Educational
group-administered questionnaire in the workplace
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Intervention_Educational
telephone interview
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Intervention_Educational
individual interview off the worksite
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Outcome_Mental
Rates of drug use self-report
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Outcome_Other
overall prevalence rates
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Outcome_Other
urinalysis positives
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Outcome_Mental
self-report positives
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Outcome_Other
drug use assessment