2007 National Roadside Survey of Alcohol and Drug Use by Drivers

2007 National Roadside Survey of Alcohol and Drug Use by Drivers: Drug ResultsTable 24. Drug Prevalence by Time of Day, Age, and Gender (Oral Fluid)N% Drug PositiveTime of Day Gender Age(Unweighted) (Weighted)16-20 59 4.5%DaytimeNighttimeMalesFemalesMalesFemales21-34 243 13.9%35-44 192 13.7%45-64 362 9.7%65+ 161 7.1%Overall Males – Daytime 1,017 11.0%16-20 39 10.3%21-34 192 7.5%35-44 181 10.1%45-64 304 16.8%65+ 84 4.8%Overall Females – Daytime 800 11.4%16-20 598 20.7%21-34 1,492 20.2%35-44 630 18.2%45-64 734 7.2%65+ 101 1.9%Overall Males – Nighttime 3,555 16.7%16-20 362 9.5%21-34 940 11.9%35-44 409 10.9%45-64 480 13.1%65+ 47 2.3%Overall Females – Daytime 2,238 11.3%Comparisons by self-reported race and ethnicity (Table 25) showed that, in both the daytime andnighttime samples, drivers who identified themselves as Asian were significantly less likely to bedrug-positive (4.1% and 1.8% respectively) than drivers who identified themselves as AfricanAmerican, Hispanic, White, or Other (p < .05 at daytime, p < .01 at nighttime). Althoughstatistically non-significant, African American drivers were found to have the highest percentageof drug-positive results in both daytime (14.4%) and nighttime (20.5%) samples, followed byOther (12.8% daytime and 16.2% nighttime), and White (11.6% daytime and 15% nighttime).41