U.S. 2018 Positivity Drug Test Rate Hits 14-Year High

Quest Diagnostic April 11, 2019


2018 drug tests positivity rate at 14 years high

Analysis of more than ten million workplace drug test results shows increases in marijuana positivity across nearly all employee testing categories

Increases in post-accident positivity in the general U.S. workforce outpace those for all other testing reasons, including pre-employment screening






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