Demographics of patients with positive and negative BAC
| Variable | BAC−, n (%) N=1399 | BAC+, n (%) N=793 | p Value |
|---|---|---|---|
| Age | 41±19 | 41±13 | 0.256 |
| Age category | |||
| 0–9 years | 2 (0.1) | 0 (0.0) | 0.287 |
| 10–19 years | 205 (14.7) | 16 (2.0) | 0.000 |
| 20–29 years | 290 (20.7) | 166 (20.9) | 0.910 |
| 30–39 years | 186 (13.3) | 200 (25.2) | 0.000 |
| 40–49 years | 196 (14.0) | 214 (27.0) | 0.000 |
| 50–59 years | 249 (17.8) | 140 (17.7) | 0.932 |
| ≥60 years | 271 (19.4) | 57 (7.2) | 0.000 |
| Gender | 0.000 | ||
| Male | 996 (71.2) | 698 (88.0) | |
| Female | 403 (28.8) | 95 (12.0) | |
| Time | |||
| 7:00–17:00 | 636 (45.5) | 147 (18.5) | 0.000 |
| 17:00–23:00 | 436 (31.2) | 314 (39.6) | 0.000 |
| 23:00–7:00 | 323 (23.1) | 329 (41.5) | 0.000 |
| Mechanism | |||
| Driver of MV | 50 (3.6) | 44 (5.5) | |
| Passenger of MV | 23 (1.6) | 9 (1.1) | |
| Driver of motorcycle | 925 (66.1) | 510 (64.3) | |
| Passenger of motorcycle | 59 (4.2) | 20 (2.5) | |
| Bicycle | 48 (3.4) | 23 (2.9) | |
| Pedestrian | 36 (2.6) | 15 (1.9) | |
| Unspecific | 258 (18.4) | 172 (21.7) | |
| Helmet (motorcycle riders) | |||
| Yes | 741 (80.1) | 369 (72.4) | 0.001 |
| No | 140 (15.1) | 117 (22.9) | 0.000 |
| Unknown | 44 (4.8) | 24 (4.7) | 0.965 |
| BAC level (mg/dL) | |||
| Mean | 6.4 | 192.3 | |
| Range | 0–49 | 50–443 | |
BAC, blood alcohol concentration; MV, motor vehicle