Table 3

 Multivariate analysis of the risk factors of AIS2+ injury to the head, chest, and abdomen in 7568 restrained car passengers injured in a road accident (adjusted odds ratios and 95% CI)

Variables (n)AIS2+ head injury (n = 418)AIS2+ chest injury (n = 390)AIS2+ abdominal and/or pelvic injury (n = 73)
Age group
    0–4 years (272)1.39 (0.83 to 2.34) 0.24 (0.08 to 0.78) 1.39 (0.40 to 4.84)
    5–9 years (352)1.38 (0.87 to 2.18) 0.30 (0.12 to 0.74) 2.75 (1.17 to 6.46)
    10–14 years (409)1.10 (0.71 to 1.71) 0.48 (0.25 to 0.91) 2.16 (0.95 to 4.89)
    15 and more (6535)1.01.01.0
Gender
    Female (4963) 0.75 (0.61 to 0.92) 1.56 (1.23 to 1.99) 1.18 (0.71 to 1.94)
    Male (2605)1.01.01.0
Seat location
    Rear (1500)0.94 (0.71 to 1.25) 0.70 (0.51 to 0.98) 1.02 (0.54 to 1.95)
    Unknown (1381)0.95 (0.73 to 1.24)0.79 (0.59 to 1.04)1.02 (0.54 to 1.93)
    Front (4687)1.01.01.0
Road type
    Non-urban road (2283) 1.52 (1.23 to 1.89) 1.62 (1.30 to 2.02) 2.08 (1.26 to 3.44)
    Other (1530)0.90 (0.67 to 1.21)0.86 (0.63 to 1.17)0.93 (0.44 to 1.95)
    Urban road (3755)1.01.01.0
Time of accident
    Night (1878) 1.58 (1.26 to 1.98) 0.94 (0.73 to 1.20)1.28 (0.75 to 2.20)
    Unknown (1649)0.98 (0.74 to 1.30)0.80 (0.60 to 1.07)1.01 (0.53 to 1.94)
    Daytime (4041)1.01.01.0
Date of accident
    Non-school days (5212)0.96 (0.78 to 1.19)0.85 (0.69 to 1.060.93 (0.56 to 1.53)
    School days (2356)1.01.01.0