2007 National Roadside Survey of Alcohol and Drug Use by Drivers

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2007 National Roadside Survey of Alcohol and Drug Use by Drivers: Drug ResultsTable 87. Drug Prevalence by Age (Blood)AgeN(Unweighted)% Drug Positive(Weighted)16-20 459 20.5%21-34 1,372 15.2%35-44 625 10.7%45-64 697 11.2%65+ 91 6.0%Overall 3,244 14.0%Comparisons between gender within age group (Table 88) showed that drug prevalence amongmale drivers ages 16-20 was significantly higher than female drivers ages 16-20 (p < .01).Further, drug prevalence among male drivers aged 21-34 was also significantly higher than thesame-aged female counterparts (p < .05).Among drivers aged 45-64, however, drug prevalencewas higher in females than in males (p < .01).Table 88. Drug Prevalence by Age and Gender (Blood)GenderMalesFemalesAgeN(Unweighted)% Drug Positive(Weighted)16-20 301 22.8%21-34 825 16.9%35-44 368 11.2%45-64 413 8.3%65+ 61 6.0%Overall Males 1,968 14.6%16-20 158 16.5%21-34 547 12.2%35-44 254 10.5%45-64 283 16.7%65+ 30 5.8%Overall Females 1,272 13.0%Comparing drug prevalence between race/ethnicity (Table 89), Asian drivers were significantlyless likely to be drug positive (1.3%) than drivers who identified themselves as AfricanAmerican, Hispanic, White, or Other (p < .01).Table 89. Drug Prevalence by Race/Ethnicity (Blood)Race/EthnicityN(Unweighted)% Drug Positive(Weighted)African American 569 16.8%Asian 87 1.3%Hispanic 585 10.0%White 1,836 15.5%Other 165 19.7%Overall 3,242 14.0%Race/Ethnic groups other than “Hispanic” are always “non-Hispanic.”78
2007 National Roadside Survey of Alcohol and Drug Use by Drivers: Drug ResultsLooking at drug prevalence by education level (Table 90), drivers who identified themselves ascollege graduates or having some college experience were significantly less likely to be drugpositive(p < .01) than drivers with other educational attainment.Table 90. Drug Prevalence by Education Level (Blood)Education LevelN(Unweighted)% Drug Positive(Weighted)Not a High School Graduate 289 20.3%High School Graduate 831 16.5%Some College 1,318 12.5%College Graduate 594 10.8%Some Graduate Work 212 13.5%Overall Nighttime 3,245 14.0%When examining drug prevalence by employment status (Table 91), drivers on disability showeddrug prevalence that was significantly higher than employed drivers, as well as homemakers,students, unemployed drivers, and drivers who reported that they were retired (p < .01). Nostatistical difference in drug prevalence was found between employed and unemployed drivers(p value = .06). “Retired” drivers had significantly lower drug prevalence than employed drivers(p < .05).Table 91. Drug Prevalence by Employment Status (Blood)GenderN(Unweighted)% Drug Positive(Weighted)Employed/Self Employed 2,592 13.6%Homemaker 67 12.0%Student 274 15.3%Unemployed 121 20.4%Retired 124 6.0%On Disability 47 41.4%Other 20 15.6%Overall 3,245 14.0%79
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DOT HS 811 249December 2009
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2007 National Roadside Survey of Alcohol and Drug Use by Drivers

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