Table 1 Person-level characteristics for rear-seated passengers, stratified by belt and passenger status ( n , %)
Belted | Unbelted | Total | ||||
|---|---|---|---|---|---|---|
Lived | Died | Lived | Died | Chi-square a | ||
n (%) | n (%) | n (%) | n (%) | χ 2 ( p value) | ||
Total | 2,918 (40.4) | 560 (7.8) | 2,220 (30.7) | 1,531 (21.2) | 7,229 | 536.2 (<0.0001) |
Passenger characteristics | ||||||
Passenger age (years) | 233.8 (<0.0001) | |||||
<20 | 492 (16.9) | 69 (12.3) | 474 (21.4) | 257 (16.8) | 1,292 (17.9) | |
20 to 44 | 1,652 (56.6) | 182 (32.5) | 1,149 (65.3) | 884 (57.7) | 4,167 (57.6) | |
45 to 64 | 510 (17.5) | 117 (20.9) | 239 (10.8) | 240 (15.7) | 1,106 (15.3) | |
≥65 | 264 (9.1) | 192 (34.3) | 58 (2.6) | 150 (9.8) | 664 (9.2) | |
Passenger gender | 2.3 (0.022) | |||||
Male | 1,518 (52.0) | 228 (40.7) | 1,327 (59.8) | 868 (56.7) | 3,941 (54.5) | |
Driver characteristics | ||||||
Driver age (years) | 15.9 (0.0435) | |||||
<20 | 353 (12.1) | 64 (11.4) | 342 (15.5) | 243 (15.9) | 1,002 (13.9) | |
20 to 44 | 1,571 (54.0) | 240 (42.9) | 1,421 (64.2) | 943 (61.8) | 4,175 (57.9) | |
45 to 64 | 713 (24.5) | 163 (29.1) | 345 (15.6) | 256 (16.8) | 1,477 (20.5) | |
≥65 | 275 (9.4) | 93 (16.6) | 106 (4.8) | 84 (5.5) | 558 (7.7) | |
Driver gender | 1.9 (0.1643) | |||||
Male | 2,037 (70.0) | 368 (65.7) | 1,633 (74.0) | 1,092 (71.7) | 5,130 (71.2) | |
Driver drinking or drugged | 21.3 (<0.0001) | |||||
Yes | 492 (17.6) | 94 (18.1) | 850 (40.6) | 553 (38.4) | 1,989 (29.0) | |
Driver belt status | 2.1 (0.1469) | |||||
Belted | 2,585 (90.5) | 513 (94.8) | 1,131 (52.8) | 941 (64.5) | 5,170 (73.9) | |