Predictors of admission and associated ORs
| Variables | OR (95% CI) | P value |
| Alcohol | ||
| No | Reference | |
| Yes | 3.00 (1.17 to 7.74)* | 0.023 |
| Mechanism of injury (collision) | ||
| No | Reference | |
| Yes | 0.57 (0.16 to 2.01) | 0.396 |
| Mechanism of injury (loss of control) | ||
| No | Reference | |
| Yes | 2.73 (0.93 to 8.03) | 0.069 |
| Total number of body areas involved | 3.03 (1.01 to 9.11)* | 0.049 |
| Age category (years) | ||
| Under 20 | Reference | – |
| 20–29 | 1.05 (0.26 to 4.29) | 0.944 |
| 30–39 | 1.94 (0.38 to 9.79) | 0.423 |
| 40–49 | 2.89 (0.38 to 21.71) | 0.309 |
| 50 and over | 0.31 (0.06 to 1.64) | 0.167 |
*Denotes statistical significance at the 0.05 alpha level.