Quest Diagnostics

Workforce Drug Test Positivity Hits Two-Decade High

May 18, 2023

Post-accident workforce drug positivity for marijuana reached a 25-year high in 2022, finds Quest Diagnostics Drug Testing Index Analysis.

Workforce Drug Test Positivity Rate Increases For The First Time in 10 Years

September 15, 2014

Quest Diagnostics Drug Testing Index™ finds rates have surged in Colorado and Washington, but data suggests state legalization of recreational marijuana may not be sole driver of increases.

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