Table 6.
Prevalence Ratios estimating factors associated with injury severity (ISS>9) in a multivariate logistic regression model (N = 1,656), Japan, 2003
| Factors | N | PR adj. | 95% CI | |
|---|---|---|---|---|
| Gender | ||||
| Females | 744 | 1.00 | ||
| Males | 912 | 1.54 | 1.04 | 2.28 |
| Age | ||||
| 18 - 64 | 1459 | 1.00 | ||
| 65 - 74 | 119 | 3.96 | 2.35 | 6.65 |
| 75 - | 78 | 2.44 | 1.32 | 4.51 |
| Mechanism of Injury | ||||
| Automobile | 1067 | 1.00 | ||
| Bicycle | 182 | 4.36 | 2.52 | 7.55 |
| Motorcycle | 263 | 2.69 | 1.65 | 4.40 |
| Pedestrian | 111 | 3.57 | 3.11 | 4.02 |
| Others | 33 | 1.70 | 0.52 | 5.40 |
| Address | ||||
| in Kurume | 976 | 1.00 | ||
| outside Kurume | 680 | 2.83 | 1.90 | 4.19 |
| Transfer | ||||
| Walk-in | 813 | 1.00 | ||
| Ambulance | 843 | 21.79 | 9.47 | 50.14 |
| Weekend | ||||
| Yes | 585 | 1.00 | ||
| No | 1071 | 1.79 | 1.18 | 2.72 |
PR adj: Adjusted Prevalence Ratios
The area under ROC curve = 0.86
P-value of the goodness of the fit = 0.925
CI: Confidence Intervals