Demographic and claim characteristics of mild traumatic brain injury cohort and outcome variables
| WPV (n=1577) | % | Non-WPV (n=12 512) | % | P value | ||
| Sex | Males | 901 | 57.1 | 7139 | 57.1 | 0.538 |
| Females | 671 | 42.5 | 5307 | 42.4 | ||
| Missing | 5 | 0.0 | 66 | 0.5 | ||
| Age | 18–30 years | 407 | 25.8 | 2932 | 23.4 | <0.001 |
| 31–40 years | 362 | 23.0 | 2541 | 20.3 | ||
| 41–50 years | 411 | 26.1 | 2939 | 23.5 | ||
| 51–65 years | 397 | 25.2 | 4100 | 32.8 | ||
| Income | US$0–25 000 | 349 | 22.1 | 2817 | 22.5 | <0.001 |
| US$25 001–50 000 | 579 | 36.7 | 5417 | 43.3 | ||
| US$50 001–75 000 | 250 | 15.9 | 2138 | 17.1 | ||
| US$75 000+ | 398 | 25.2 | 2137 | 17.1 | ||
| Missing | 4 | 0.1 | 3 | 0.1 | ||
| Industry | Retail trade | 123 | 7.8 | 1538 | 12.3 | <0.001 |
| Educational services | 249 | 15.8 | 916 | 7.3 | ||
| Manufacturing | 59 | 3.7 | 1082 | 8.6 | ||
| Public administration | 317 | 20.1 | 789 | 6.3 | ||
| Healthcare and social assistance | 186 | 11.8 | 902 | 7.2 | ||
| Administration, support, waste management and remediation services | 102 | 6.5 | 1067 | 8.5 | ||
| Accommodation and food services | 84 | 5.3 | 852 | 6.8 | ||
| Construction | 62 | 3.9 | 1026 | 8.2 | ||
| Other | 395 | 25.0 | 4343 | 34.7 | ||
| Job class | Sedentary/light | 823 | 52.2 | 5759 | 46.0 | <0.001 |
| Medium | 338 | 21.4 | 2909 | 23.2 | ||
| Heavy/very heavy | 100 | 6.3 | 1186 | 9.5 | ||
| Missing | 316 | 20.0 | 2658 | 21.2 | ||
| Location | Rural | 115 | 7.3 | 893 | 7.1 | 0.809 |
| Urban | 1451 | 92.0 | 11 513 | 92.0 | ||
| Missing | 11 | 0.7 | 106 | 0.9 | ||
| Coexisting conditions | 0 | 1418 | 89.9 | 11 274 | 90.1 | 0.944 |
| 1–4 | 127 | 8.1 | 981 | 7.8 | ||
| 5+ | 32 | 2.0 | 257 | 2.1 | ||
| Outcomes | ||||||
| Duration | Calendar days away from work, median (IQR) | 36 (6–204) | 40 (6–215) | 0.1979 | ||
| Cost (US$) | Median (IQR) | US$15 228 (3903–48 469) | US$16 737 (4020–46 859) | 0.6326 | ||
WPV, workplace violence.