Table 2. Demographics and clinical characteristics of the general cohort and the cohorts with completed and uncompleted SF-12 Health Surveys.
| Demographics and clinical characteristics | General cohort (n = 915) | Completed SF-12 Health Survey cohort (n = 479) | Uncompleted SF-12 Health Survey cohort (n = 436) |
|---|---|---|---|
| Age | |||
| Mean (± SD) | 50.3 (± 21.9) | 47.5 (± 19.1) | 53.4 (± 24.1) |
| Elderly (≥65 y) | 258 (28.2%) | 104 (21.7%) | 154 (35.3%) |
| Gender | |||
| Male | 623 (68.1%) | 344 (71.8%) | 279 (64%) |
| Female | 292 (31.9%) | 135 (28.2%) | 157 (36%) |
| Ratio | 2.1 | 2.5 | 1.8 |
| Mechanism of injury | |||
| Motor vehicle occupants | 406 (44.3%) | 224 (46.8%) | 182 (41.7%) |
| Unprotected road users | 121 (13.2%) | 59 (12.3%) | 62 (14.2%) |
| Low falls (<1 m) | 138 (15.1%) | 52 (10.9%) | 86 (19.7%) |
| High falls (>1 m) | 178 (19.5%) | 99 (20.7%) | 79 (18.1%) |
| Significant collision (not road related) | 61 (6.7%) | 40 (8.4%) | 21 (4.8%) |
| Other causes | 11 (1.2%) | 5 (1%) | 6 (1.4%) |
| Injury Severity Score | |||
| Median | 14 | 14 | 14 |
| 25th/75th percentile | 9/22 | 9/22 | 9/22 |
| Severe | 420 (45.9%) | 233 (48.6%) | 187 (42.9%) |
| Traumatic brain injury | |||
| None | 762 (83.3%) | 399 (83.3%) | 363 (83.3%) |
| Yes | 153 (16.7%) | 80 (16.7%) | 73 (16.7%) |
Abbreviations: SD, standard deviation; SF-12, Short Form 12-Questionnaire Health Survey.