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Does Performing Preplacement Workplace Hair Drug Testing Influence US Department of Transportation Random and
1St. Vincent Occupational Medicine Clinic, Evansville, IN.
Background:
Does performing pre-employment hair drug testing subsequently affect the prevalence of positive random and postaccident urine drug tests?
Methods:
This cross-sectional study was designed to evaluate the prevalence of positive postaccident and random workplace urine drug tests for companies that perform pre-employment hair and urine drug testing to companies that only perform pre-employment urine drug testing.
Results:
Fisher exact test of independence indicated no significant difference between pre-employment hair drug testing and overall US Department of Transportation random and postaccident urine drug test positivity rates.
Conclusions:
The analysis failed to reject the null hypothesis, suggesting that pre-employment hair drug testing had no effect upon random and postaccident urine drug test positivity rates.
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