Tag: drug use in the U.S. workforce

News

Drug Testing Index: A look at 2014-2018

May 10, 2018 By

The Quest Diagnostics Drug Testing Index reveals insights into patterns of drug use among the U.S. workforce on its 30th anniversary. Download our timeline.

News

Workforce drug test positivity rate increases

September 11, 2014 By

The Quest Diagnostics Drug Testing Index showed the percentage of positive drug tests among American workers has increased for the first time in more than a decade.