released today by Quest Diagnostics Incorporated.. Workplace drug use decreased during 1999 to ADA Live the lowest Appleton Healthcare Jobs at level in 11 years, as measured by the semi-annual Drug Testing Index, released today by Quest. Cocaine positive drug tests make up 15%, and opiates

(focused on heroin) follow with 6.6% of the total (Quest Diagnostics Drug Testing Index, 2006).. The Quest Diagnostics Drug Testing Index also tracked cocaine positivity rates for the combined US workforce by nine geographic regional divisions

of the US. Quest Diagnostics Drug Testing Index(R) Finds Cocaine Use at 10-Year Low Among U.S. Workers. PRNewsWire News Releases. Published: 080907