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New Hair Data Validate Sharp Downward Trend in Cocaine and Methamphetamine Positivity in General U.S. Workforce, According to Quest Diagnostics Drug Testing Index(TM)
Date:11/20/2009

of opportunity to detect use, and may also reduce the effectiveness of a job applicant's efforts to "prepare" for a drug test--most often by trying to beat the test by halting drug use several days before, or by attempting to alter results with specimen adulterants, or by substituting samples. Yet hair testing is not effective in detecting drug use in post-accident or reasonable-suspicion test cases. In these situations, urine or oral-fluid testing are more effective than hair testing in detecting drug use because, unlike hair testing, they can detect a drug in the system as closely as possible to the time of its use.

Employers that implement drug testing programs do so for a variety of reasons, most often to protect the health and well-being of employees and avert business risk associated with drug-induced judgments.

"The higher hair positivity rates in the Quest Diagnostics DTI report are consistent with those we see in the drug testing programs we implement for employers," said Joseph R. Gonzalez, President of Advanced Workplace Strategies, Inc. (AWSI). "When employers add hair testing, they are finding large increases in positivity rates compared to those with urine testing alone, and the rise is particularly evident with cocaine and amphetamines/methamphetamines. In addition, they are finding that, like random urine drug testing, hair testing may be serving as a powerful deterrent to worker drug use."

First Large-Scale Study of Same-Donor Hair and Urine Results Sheds Light on Distinct Advantages of Different Test Methods

To date, there has been no large, published side-by-side analysis of hair and urine specimens collected simultaneously from the same donor. At the October 22nd Oklahoma City meeting of The Society of Forensic Toxicologists (SOFT), Quest Diagnostics' Dr. Sample presented results of the first such analysis. The study was separate from the Drug Testing Index, and looked at a data set of more than
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SOURCE Quest Diagnostics Incorporated
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