Crash Characteristics of the Study Group
| Characteristic | Overall, Weighted % (Unweighted n) (N = 7151) | BPB Seat, Weighted % (Unweighted n) (N = 1604) | Seat Belt, Weighted % (Unweighted n) (N = 5547) | Pa |
|---|---|---|---|---|
| Vehicle type | .090 | |||
| Passenger car | 41.8 (3333) | 41.3 (674) | 42.1 (2659) | |
| Large van | 2.0 (161) | 1.1 (27) | 2.4 (134) | |
| Pickup truck | 4.4 (296) | 4.7 (73) | 4.2 (223) | |
| SUV | 25.0 (1568) | 26.2 (404) | 24.5 (1164) | |
| Minivan | 26.7 (1793) | 26.7 (426) | 26.7 (1367) | |
| Model year | <.001 | |||
| 1990–1997 | 37.3 (3275) | 23.0 (438) | 43.5 (2837) | |
| 1998–2001 | 38.5 (2547) | 38.2 (597) | 38.6 (1950) | |
| 2002–2008 | 24.2 (1329) | 38.8 (569) | 17.8 (760) | |
| Crash severity | .032 | |||
| Any intrusion | 7.7 (1454) | 6.3 (300) | 8.2 (1154) | |
| Towaway, no intrusion | 27.4 (3001) | 26.1 (639) | 28.0 (2362) | |
| None | 65.0 (2696) | 67.6 (665) | 63.8 (2031) | |
| Direction of initial impact | .018 | |||
| Front | 46.6 (3312) | 43.8 (695) | 47.9 (2617) | |
| Near side | 9.4 (744) | 11.9 (228) | 8.3 (516) | |
| Far side | 11.6 (943) | 12.0 (217) | 11.4 (726) | |
| Rear | 30.2 (1952) | 30.6 (425) | 30.0 (1527) | |
| Other/miscellaneous/unknown | 2.2 (200) | 1.8 (39) | 2.4 (161) |
↵a P values between BPB seat and seat belt groups where applicable. For categorical (nondichotomous) variables, the P values refer to the differences in the distribution of the variables between the BPB seat and seat belt groups.