Agreement between clinical assessment (Y91) and blood alcohol concentration (BAC) (Y90)
| All injury patients | Patients drinking 6 hours before injury | |||||
|---|---|---|---|---|---|---|
| n | Raw agreement (%) | Tau-B (SE) | n | Raw agreement (%) | Tau-B (SE) | |
| †Significantly different from negative RAPS4 (*p<0.05); | ||||||
| ‡Significantly different from negative tolerance (***p<0.001). | ||||||
| Total | 4798 | 86.4 | 0.679 (0.014) | 951 | 39.4 | 0.319 (0.026) |
| Male | 3160 | 82.4 | 0.663 (0.015) | 802 | 38.9 | 0.312 (0.029) |
| Female | 1631 | 94.1 | 0.704 (0.036) | 148 | 42.5 | 0.373 (0.062) |
| BAC 30 min to 3 h before assessment | 189 | 85.7 | 0.459 (0.096) | 38 | 39.5 | 0.154 (0.150) |
| BAC 1–30 min before assessment | 254 | 87.4 | 0.754 (0.051) | 48 | 47.9 | 0.410 (0.110) |
| BAC the same time as assessment | 739 | 84.7 | 0.587 (0.039) | 143 | 27.3 | 0.179 (0.068) |
| BAC 1–30 mins after assessment | 2782 | 86.0 | 0.704 (0.017) | 566 | 40.8 | 0.336 (0.034) |
| BAC 30 min to 3 h after assessment | 243 | 93.0 | 0.683 (0.085) | 27 | 48.2 | 0.587 (0.118) |
| Positive RAPS4 | 948 | 66.1 | 0.576 (0.023)*† | 493 | 39.8 | 0.277 (0.038) |
| Negative RAPS4 | 3616 | 91.9 | 0.648 (0.023) | 407 | 39.1 | 0.340 (0.038) |
| Positive tolerance | 215 | 51.6 | 0.481 (0.044)***‡ | 151 | 32.9 | 0.269 (0.065) |
| Negative tolerance | 4313 | 88.4 | 0.674 (0.016) | 725 | 40.3 | 0.332 (0.030) |