2007 National Roadside Survey of Alcohol and Drug Use by Drivers

2007 National Roadside Survey of Alcohol and Drug Use by Drivers: Drug ResultsTable 51 shows the daytime distribution of drug categories by seat belt use. Differences indaytime oral fluid drug category results involving seat belt use by the driver were not statisticallysignificant.Table 51. Daytime: Seat Belt Observation by Drug Category (Percentages Calculated by Row)(Oral Fluid)N(Unwtd)%Illegal(Weighted)%Medications(Weighted)% Illegal &Medications(Weighted)%Negative(Weighted)Driver Seat Belt ObservationYes 1,750 5.6% 5.0% 0.4% 89.0%No 92 10.3% 2.7% 0.7% 86.2%Table 52 shows the nighttime distribution of drug categories by seat belt use. The prevalence ofillegal (“Illegal” and “Illegal and Medication” combined) drugs was higher among those who didnot use a seat belt (p < .01).Table 52. Nighttime: Belt Observation by Drug Category (Percentages Calculated by Row) (OralFluid)N(Unwtd)%Illegal(Weighted)%Medications(Weighted)% Illegal &Medications(Weighted)% Negative(Weighted)Driver Seat Belt ObservationYes 5,353 10.2% 3.0% 0.9% 85.9%No 192 18.1% 5.0% 1.5% 75.4%The number of motorcyclists sampled in the daytime was very small, thus limiting our ability toperform meaningful statistical comparisons. However, we display daytime and nighttime helmetuse (for the operator) by overall drug use prevalence, class and category in Tables 53-58. Notethere were an extremely low number of motorcycle riders with passengers. Thus, these areexcluded from our tables and our analyses.Table 53. Daytime: Helmet Use for Motorcycle Riders (Operators), by Drug Positive (Oral Fluid)N(Unweighted)% Drug Positive(Weighted)Motorcycle Riders (Operators) 30 24.8%Helmet 23 23.8%No Helmet Use 6 29.9%Unknown 1 0.0%Small sample size precluded meaningful statistical comparisons.64