"The positivity rate in urine testing for cocaine increased for the fourth consecutive year in the general U.S. workforce and for the second consecutive year in the federally-mandated, safety-sensitive workforce. Cocaine positivity increased 12 percent in 2016, reaching a seven-year high of 0.28 percent, compared to 0.25 percent in 2015 in the general U.S. workforce, and seven percent among federally-mandated, safety-sensitive workers to 0.28 percent, compared to 0.26 percent in 2015."
"Quest Diagnostics Drug Testing Index™ Full year 2016 tables," Quest Diagnostics, Table 2, last accessed Nov. 13, 2017.
"Increases in Illicit Drugs, Including Cocaine, Drive Workforce Drug Positivity to Highest Rate in 12 Years, Quest Diagnostics Analysis Finds," Quest Diagnostics, May 16, 2017.
