Table 2 Predictors of persistent neck pain—mechanical (collision) factors.
| Persistent neck pain* n (%) | Relative risk† (95%CI) | ||
|---|---|---|---|
| No | Yes | ||
| Own vehicle | |||
| Car | 344 (74.1) | 120 (25.9) | 1.0 |
| Other | 7 (46.7) | 8 (53.3) | 2.0 (1.2 to 3.3) |
| Severity of collision (VAS) (tertiles) | |||
| Low | 134 (80.7) | 32 (19.3) | 1.0 |
| Medium | 105 (70.0) | 45 (30.0) | 1.6 (1.1 to 2.3) |
| High | 110 (69.6) | 48 (30.4) | 1.6 (1.1 to 2.3) |
| Speed of own vehicle | |||
| Stationary | 198 (75.0) | 66 (25.0) | 1.0 |
| ⩽25 mph | 94 (74.6) | 32 (25.4) | 1.0 (0.7 to 1.4) |
| >25 mph | 57 (67.1) | 28 (32.9) | 1.4 (0.9 to 2.0) |
| Speed of other vehicle | |||
| Stationary | 29 (78.4) | 8 (21.6) | 1.0 |
| ⩽25 mph | 136 (72.7) | 51 (27.3) | 1.2 (0.6 to 2.3) |
| >25 mph | 138 (73.4) | 50 (26.6) | 1.2 (0.6 to 2.2) |
| Direction of collision | |||
| Rear | 192 (74.7) | 65 (25.3) | 1.0 |
| Front | 59 (76.6) | 18 (23.4) | 0.9 (0.6 to 1.5) |
| Rear shunt | 24 (72.7) | 9 (27.3) | 1.2 (0.6 to 2.1) |
| Side | 64 (65.3) | 34 (34.7) | 1.4 (0.96 to 1.9) |
| Other | 13 (86.7) | 2 (13.3) | 0.6 (0.2 to 2.0) |
| Awareness of impending collision | |||
| Yes | 100 (75.2) | 33 (24.8) | 1.0 |
| No | 250 (72.7) | 94 (27.3) | 1.1 (0.8 to 1.5) |
| Position in vehicle | |||
| Driver | 275 (74.5) | 94 (25.5) | 1.0 |
| Passenger | 77 (69.4) | 34 (30.6) | 1.2 (0.9 to 1.7) |
| Headrest | |||
| Adjustable headrest | 269 (74.9) | 90 (25.1) | 1.0 |
| Fixed headrest | 25 (73.5) | 9 (26.5) | 1.0 (0.5 to 1.7) |
| No headrest | 18 (75.0) | 6 (25.0) | 1.0 (0.5 to 2.0) |
| Seatbelt use | |||
| Yes | 346 (73.6) | 124 (26.4) | 1.0 |
| No | 6 (60.0) | 4 (40.0) | 1.5 (0.7 to 3.3) |
| Airbag | |||
| No airbag/not deployed | 326 (73.6) | 117 (26.4) | 1.0 |
| Airbag deployed | 8 (80.0) | 2 (20.0) | 0.7 (0.2 to 2.5) |
*Totals of rows vary due to some missing data.
†Adjusted for age and sex.