Methamphetamine is accounting for a growing portion of positive workplace drug tests, according to a study released by Quest Diagnostics Inc., a provider of drug testing.
The company performed more than 7.1 million drug tests from January to December 2003, including 5.9 million tests among the general workforce. Among the general workforce (which excludes tests given to federally mandated, safety sensitive workers), 5 percent of all tests performed by the company came back positive in 2003, compared with 4.8 percent in 2002.