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Positive Drug Rates by Drug Category

A chart showing positivity rates for marijuana, cocaine, PCP and other drugs

October 3, 2003
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Related Topics: Substance Abuse, Recruitment, Staffing Management
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Positivity Rates by Drug Category
For general U.S. workforce, as a percentage of all positives
(More than 5.7 million tests from January to December 2002)

Drug Category 2002 2001 2000 1999
Acid/Base 0.25% 0.23% 0.07% 0.14%
Amphetamines 6.7 5.5 4.8 4.3
Barbiturates 2.9 3.2 3.5 3.7
Benzodiazepines 5.0 5.0 4.2 3.3
Cocaine 13.9 13.2 13.9 15.8
Marijuana 57.5 60.9 36.0 62.6
Opiates 5.3 5.5 5.2 5.1
Oxidizing adulterants
(including Nitrites)
0.48 0.51 0.88 1.6
PCP 0.47 0.46 0.45 0.35
Propoxyphene 5.6 4.0 2.5 2.0
Substituted 0.54 0.48 0.56 0.80
Source: Quest Dynamics        

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