Table 1 Demographic and injury characteristics of patients at the ED
|  | ANP patients N = 156 | nANP patients N = 766 | P-value |
|---|---|---|---|
Gender (Female) | 81 (51.9) | 271 (35.4) | < 0.001 |
Age | 38 (22–52) | 47 (25–62) | < 0.001 |
Education level (low)a | 49 (47.6) | 314 (53.2) | 0.290 |
Pre-injury mental health problemsa | 24 (21.8) | 69 (11.6) | 0.004 |
ISSa | 6 (3.1) | 7 (4.5) | 0.001 |
GCS score ED | |||
 - 15 | 110 (70.5) | 514 (67.1) | 0.406 |
 - 14 | 37 (23.7) | 203 (26.5) | 0.470 |
 - 13 | 9 (6.0) | 46 (5.8) | 0.910 |
Loss of consciousness | 133 (85.1) | 662 (86.4) | 0.700 |
PTA > 1 hb | 39 (26.0) | 200 (27.1) | 0.775 |
External head woundsb | 86 (58.1) | 547 (72.6) | < 0.001 |
Fractures of extremities | 11 (7.3) | 67 (8.9) | 0.522 |
Head CT abnormalitiesb | 14 (9.1) | 92 (12.3) | 0.265 |
Alcohol intoxication | 46 (29.5) | 285 (37.3) | 0.064 |
Hospital admission (yes) | 70 (44.9) | 458 (59.8) | 0.001 |
Symptoms at the ED | |||
 - Vomitingb | 20 (12.8) | 93 (12.1) | 0.814 |
 - Dizzinessa | 30 (19.2) | 81 (10.6) | 0.002 |
 - Nauseab | 65 (41.7) | 207 (27.0) | < 0.001 |
Trauma mechanism | |||
 - Traffic accidents | 36 (23.1) | 154 (20.1) | 0.403 |
  - motor vehicle accidents | 19 (12.2) | 43 (5.6) | 0.004 |
  - motorcycle | 4 (2.6) | 34 (4.4) | 0.139 |
  - bicycle | 11 (7.1) | 63 (8.2) | 0.066 |
  - pedestrian | 1 (0.6) | 7 (0.9) | 0.203 |
 - Falls | 97 (62.2) | 509 (66.4) | 0.306 |
 - Other | 23 (14.7) | 103 (13.4) | 0.667 |
  - violence | 11 (7.1) | 64 (8.4) | 0.587 |
  - sports | 4 (2.6) | 9 (1.2) | 0.252 |
  - not specified | 8 (5.1) | 30 (3.9) | 0.488 |