Baseline characteristics
| With injury (n=5247) | Without injury (n=1 42 825) | |
| Age, years (mean±SD)* | 29.4 (2.9) | 30.2 (3.0) |
| Male (N, %) | 3491 (67) | 64 703 (45) |
| Residential area, Malmö (N, %) | 1252 (24) | 35 309 (25) |
| Income (N, %)† | ||
| <806 SEK | 431 (8) | 14 408 (10) |
| 806–1152 SEK | 665 (13) | 21 552 (15) |
| 1152–1507 SEK | 1289 (25) | 35 722 (25) |
| 1507–1893 SEK | 1415 (27) | 35 581 (25) |
| 1893–2335 SEK | 914 (17) | 21 319 (15) |
| >2335 SEK | 533 (10) | 14 240 (10) |
| Education (N, %)‡ | ||
| Primary school | 676 (13) | 16 935 (12) |
| Secondary school (up to 2 years) | 1450 (28) | 35 427 (25) |
| Secondary school (up to 3 years) | 1679 (32) | 41 670 (29) |
| Higher education (<3 years) | 646 (12) | 19 743 (14) |
| Higher education (>3 years) | 778 (15) | 28 022 (30) |
| Diabetes, yes (N, %)§ | 34 (0.7) | 1484 (1) |
| Obesity, yes (N, %)§ | 50 (1) | 1418 (1) |
| Hypertension, yes (N, %)§ | 19 (0.4) | 644 (0.5) |
| Follow-up time, months (Median, IQR) | 14.5 (12.1–16.9) | 13.9 (11.7–16.8) |
*Age at index visit.
†Income in hundred SEK per year.
‡Higher education indicates education at a university or college
§Based on diagnosis in Skåne Health Register data
IQR, interquartile range (25th quntile, 75th quantile); SD, Standard Deviation; SEK, Swedish Kronor.