Table 3.
Adjusted incidence rate ratios (aIRRpy) for being a driver in a fatal crash per person-year, comparing persons exposed to GDL laws with those not exposeda,b
| Age (yr) | aIRRpy | 95% CI |
|---|---|---|
| 16 | 0.65 | 0.47, 0.91 |
| 17 | 0.83 | 0.60, 1.17 |
| 18 | 0.93 | 0.72, 1.19 |
Abbreviation: aIRRpy: adjusted incidence rate ratio per person-year; CI: confidence interval.
a
Exposure to GDL means living in a state that has graduated driver licensing laws to restrict adolescent driving.
b
aIRRpy adjusted for changes over time as well as changes among drivers 20–24 years.