| Not tested | Tested | Total | |
| N = 229 | N = 1908 | N = 2137 | |
| Gender (male)* | 106 (46%) | 739 (39%) | 845 (40%) |
| N = 2137 | |||
| Mean age (SD) | 56.80 (20.52) | 55.64 (21.04) | 56.67 (20.58) |
| N = 2137 | |||
| Ethnicity (British white) | 98 (43%) | 803 (42%) | 901 (42%) |
| N = 1912 | |||
| Computed tomography scan (n % yes) | 30 (13%) | 311 (16%) | 341 (16%) |
| N = 2112 | |||
| Intubation (n % yes) | 8 (4%) | 76 (4%) | 84 (4%) |
| N = 2115 | |||
| Median GCS score (range) | 15 (12) | 15 (14) | 15 (14) |
| N = 2081 | |||
| Diagnosis (ICD code) N = 2137 | |||
| External causes of morbidity (V01–Y98) | 39 (17%) | 235 (12%) | 274 (13%) |
| Diseases of the circulatory system (I00–I99) | 84 (37%) | 776 (41%) | 860 (40%) |
| Diseases of the respiratory system (J00-J99) | 25 (11%) | 287 (15%) | 312 (15%) |
| Diseases of the nervous system (G00–G99) | 15 (6%) | 101 (5%) | 116 (5%) |
| Mental and behavioural disorders (F00–F99) | 11 (5%) | 90 (5%) | 101 (5%) |
| Diseases of the digestive system (K00–K93) | 10 (4%) | 115 (6%) | 125 (6%) |
| Other | 45 (20%) | 304 (16%) | 349 (16%) |
*p<0.01. BAC, blood alcohol concentration; GCS, Glasgow coma scale; ICD, International Classification of Diseases.