Variable | Risk ratio | 95% CI |
---|---|---|
*Age expressed as years divided by 10, so that each 1 unit change is for 10 year change in age. | ||
Used seat belt | 0.36 | 0.29 to 0.46 |
Age* | 1.00 | 0.74 to 1.35 |
Age squared* | 1.04 | 1.01 to 1.08 |
Male sex | 0.71 | 0.61 to 0.82 |
Driver | 0.97 | 0.88 to 1.07 |