US Workers Increasingly Failing Drug Tests

September 15, 2014 10:19 AM

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US Workers Increasingly Failing Drug Tests

Fueled by an increase in employee use of marijuana and amphetamines, the number of failed drug tests has gone up for the first time in more than a decade, according to research from Quest Diagnostics, a diagnostic information services firm.

An analysis of 7.6 million urine drug tests revealed a 3.7 percent failure rate in 2013, compared with a rate of 3.5 in 2012, a relative increase of more than 5 percent. . This is the first time the rate of positive tests has gone up since 2003.

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