2007 National Roadside Survey of Alcohol and Drug Use by Drivers

2007 National Roadside Survey of Alcohol and Drug Use by Drivers: Drug ResultsComparison of drug class by age (Table 96) showed that drivers 34 or younger were more likelyto test positive for marijuana than drives in other age groups (p < .01). Among drivers aged 16-34, drivers aged 16-20 years had the highest marijuana positives (15.2%). The prevalence ofnarcotic-analgesics was higher among the 16-20 and 35-44 year age group (1.3% and 1.7%) thanamong any other age group (p < .01).Table 96. Drug Classes Distribution by Age (Blood)Drug Class16-20%21-34%35-44%45-64%65+%Total%N=459 N=1,372 N=625 N=697 N=91 N=3,244Antidepressants 0.3% 0.6% 0.9% 2.8% 1.0% 1.1%Marijuana 15.2% 8.8% 3.1% 1.0% 0.0% 6.8%Narcotic-Analgesics 1.3% 0.7% 1.7% 0.4% 0.0% 0.9%Sedatives 0.0% 0.8% 1.0% 2.1% 4.8% 1.1%Stimulants 0.7% 1.8% 2.0% 2.7% 0.0% 1.8%Other 0.2% 0.4% 0.2% 0.0% 0.0% 0.2%More than 1 Class 2.7% 1.9% 1.8% 2.3% 0.1% 2.0%Overall Drug Positive 20.5% 15.2% 10.7% 11.2% 6.0% 14.0%Negative 79.5% 84.8% 89.3% 88.8% 94.0% 86.0%“More than 1 Class” – Drivers testing positive for more than one drug are only counted in this category.In this table, percentages are weighted.Driver Drug Use Prevalence by Drug Category Based on Blood ResultsIn this section of the report, we display drug use prevalence results from blood tests by drugcategory.About 9 percent of the nighttime drivers providing blood tested positive for drugs in the “Illegal”category (Table 97). Four percent were positive for “Medications,” and 0.7 percent were positivefor both “Illegal and Medications.”Table 97. Drug Categories Distribution (Blood)Drug CategoryN(Unweighted)%(Weighted)Illegal 267 9.1%Medications 169 4.0%Illegal & Medications 30 0.7%Negative 2,810 86.2%Overall 3,276 100.0%“Medications” includes prescription and over-the-counter drugs.82