Table 2

Odds ratio (95% CI) between vehicle year and car crash injury

Vehicle yearUnadjustedDriver’s age and sex adjustedMultivariable adjusted*
*Adjusted for driver’s age, sex, education level, ethnicity, time of day, acute sleepiness score, marijuana and alcohol use before the crash, seatbelt use, driving exposure (hours/week), licence type, current vehicle safety inspection certificate, insurance status of the vehicle, number of passengers, traveling speed, and engine size.
<19845.94 (3.47 to 10.16)4.80 (2.68 to 8.58)2.88 (1.20 to 6.91)
1984 to 19882.27 (1.44 to 3.57)1.81 (1.14 to 2.88)1.02 (0.52 to 2.01)
1989 to 19932.00 (1.28 to 3.13)1.66 (1.05 to 2.62)1.38 (0.72 to 2.64)
⩾19941.001.001.00