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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.
Journal of Addiction Medicine
|January 20, 2018
Summary
Pre-employment hair drug testing does not appear to impact the rates of positive random or post-accident urine drug tests in the workplace. This finding suggests no significant deterrent effect from hair testing on subsequent urine test positivity.
Area of Science:
- Occupational Health
- Forensic Toxicology
- Workplace Safety
Background:
- Workplace drug testing is crucial for maintaining safety and productivity.
- Pre-employment drug screening methods, including hair and urine tests, are widely used.
- The potential impact of hair drug testing on subsequent urine test positivity rates remains an area of investigation.
Purpose of the Study:
- To evaluate the prevalence of positive post-accident and random workplace urine drug tests.
- To compare companies utilizing pre-employment hair and urine testing with those using only pre-employment urine testing.
Main Methods:
- A cross-sectional study design was employed.
- Data on positive urine drug tests (random and post-accident) were collected.
- Companies were categorized based on their pre-employment drug testing protocols (hair and urine vs. urine only).
Main Results:
- A Fisher exact test of independence was conducted.
- No statistically significant difference was found in positivity rates between the two groups of companies.
- The results indicated no significant variation in US Department of Transportation random and post-accident urine drug test positivity rates.
Conclusions:
- The null hypothesis could not be rejected.
- Pre-employment hair drug testing does not demonstrate a significant effect on the positivity rates of random and post-accident urine drug tests.
- These findings suggest that hair testing may not serve as a deterrent for drug use leading to positive urine tests in safety-sensitive positions.
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