Quest Diagnostics Credits Workplace Testing for Drop in Cocaine Use

Quest Diagnostics (DGX), a testing laboratory for employers and the health-care industry, reported positive urine tests for cocaine among workers and job applicants dropped by 29% in 2008, according to Dow Jones Newswires.The testing lab said a far greater share of the nation's general work force tested positive for cocaine than job applicants because of the difference in the expectation of testing.Quest credited drug testing programs used by employers for discouraging drug use. The decrease puts the share of both workers and job applicants testing positive for cocaine at 0.41% of those te...