Rising numbers: The increase in tampered tests came from samples collected in 2023, a year also marked by rising marijuana positive tests from employees and job candidates in traditional office settings, according to Quest Diagnostics.
Industry highs: Workforce positive drug screens were particularly high last year for jobs associated with office work, Quest said. Marijuana positivity was up last year in 13 out of 15 industries, led by finance and insurance, which increased more than 35%.
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