Quest Diagnostics, the world's leading provider of diagnostic information services, released its annual Drug Testing Index analysis report revealing that positivity rates for U.S. workplace drug testing has dramatically increased over a 16-year period. Based upon over 9 million urine drug tests, the 2019 positivity rate is the highest since 2003 (4.5%).
It was no surprise to learn that marijuana was the most frequently discovered drug in workplace drug testing with positivity rising by nearly 11% over 2018 and 29% in the past 5- year period. The Midwest and the West surpassed the...