Demographic characteristics of the subjects
| Accident victims | Controls | |
|---|---|---|
| Participants (n) | 210 | 210 |
| Sex (n): | ||
| Male | 181 (86%) | 181 (86%) |
| Female | 29 (14%) | 29 (14%) |
| Mean (SD) age (y) | ||
| Men | 39 (10) | 39 (10) |
| women | 36 (8) | 36 (8) |
| Mean (SD) height ( cm): | ||
| Men | 180 (5) | 178 (5) |
| Women | 166 (3) | 166 (5) |
| Mean (SD) weight (kg): | ||
| Men | 83 (11) | 79 (9) |
| Women | 65 (8) | 65 (10) |
| Highest education (n): | ||
| Primary school | 2 (1%) | 4 (2%) |
| Secondary school | 15 (7%) | 12 (6%) |
| Practical education/ professional school | 103 (49%) | 102 (49%) |
| University graduate | 68 (32%) | 69 (33%) |
| University, uncompleted | 21 (10%) | 23 (11%) |
| Other | 1 (0.5%) | 0 (0%) |
| Marital status (n): | ||
| Single | 24 (11%) | 34 (16%) |
| Married | 166 (79%) | 157 (75%) |
| Widowed | 3 (1%) | 2 (1%) |
| Divorced | 11 (5%) | 14 (7%) |
| Unknown | 6 (3%) | 3 (1%) |