Proportion of Participants Reporting a Positive Change in Injury-Related Risk Behavior at Follow-up

Positive Behavior Change3-Month Follow-up6-Month Follow-up
ControlInterventionRelative RiskControlInterventionRelative Risk
n/N*%n/N*%RR95% CIn/N*%n/N*%RR95% CI
Seatbelt use55/22924.080/24932.11.34(1.00, 1.79)55/23823.179/23433.81.47(1.09, 1.96)
Bicycle helmet use15/9016.725/8330.11.81(1.02, 3.18)10/8312.121/8724.12.00(1.00, 4.00)
Driving after drinking8/824.98/928.71.78(0.56, 5.71)5/895.67/858.21.47(0.48, 4.44)
Riding with an impaired driver29/22812.720/2488.10.68(0.36, 1.09)29/23712.222/2349.40.77(0.46, 1.30)
Binge drinking30/22713.225/24810.10.76(0.46, 1.26)32/23413.720/2288.80.64(0.38, 1.09)
Carrying a weapon21/2279.321/2478.50.92(0.52, 1.63)18/2337.718/2327.81.00(0.54, 1.88)
  • * Number with positive change in behavior (n) over number of respondents (N). Note analysis is not restricted to those endorsing risk behavior at baseline. Bicycle helmet use outcome includes only bicycle riders; driving after drinking outcome includes only drivers.

  • Positive change defined as any improvement on a Likert scale rating of frequency of use: “never,” “sometimes,” “usually,” “always.“

  • Positive change defined as improvement in dichotomized past 30-day prevalence.