Hamstring injury characteristics
| All injuries | Injury type | Injury location | |||
| Structural | Functional | Biceps femoris | Semimembranosus/ semitendinosus | ||
| Injury lay-off | |||||
| Lay-off days, median (IQR) | 13 (7 to 22) | 17 (11 to 25)* | 6 (4 to 10)* | 16 (10 to 25)* | 15 (8 to 23)* |
| Injury severity | |||||
| Slight, n (%) | 9 (0%) | 2 (0%) | 1 (0%) | 2 (0%) | 0 (0%) |
| Minimal, n (%) | 222 (8%) | 32 (2%)* | 102 (20%)* | 27 (3%)* | 19 (7%)* |
| Mild, n (%) | 508 (19%) | 128 (10%)* | 205 (40%)* | 122 (12%)* | 43 (16%)* |
| Moderate, n (%) | 1514 (57%) | 886 (68%)* | 187 (37%)* | 709 (67%) | 164 (62%) |
| Severe, n (%) | 383 (15%) | 264 (20%)* | 12 (2%)* | 194 (18%) | 39 (15%) |
| Total, n | 2636 | 1312 | 507 | 1054 | 265 |
| Injury mechanism | |||||
| Running/sprinting, n (%) | 1230 (61%) | 790 (62%)* | 232 (51%)* | 654 (64%)* | 140 (56%)* |
| Stretching, n (%) | 103 (5%) | 82 (6%)* | 14 (3%)* | 52 (5%)* | 24 (10%)* |
| Overuse/gradual onset, n (%) | 249 (12%) | 60 (5%)* | 150 (33%)* | 63 (6%) | 23 (9%) |
| Other, n (%) | 449 (22%) | 334 (26%)* | 55 (12%)* | 253 (25%) | 63 (25%) |
| Total, n | 2031 | 1266 | 451 | 1022 | 250 |
| Recurrences | |||||
| Recurrences, n (%) | 477 (18%) | 234 (18%) | 83 (16%) | 195 (19%) | 45 (17%) |
| Early recurrences, n (%) | 325 (12%) | 163 (12%) | 47 (9%) | 136 (13%) | 29 (11%) |
| Total, n | 2636 | 1312 | 507 | 1054 | 265 |
Injury mechanisms were registered starting from the 2008/09 season and are thus missing for 605 injuries.
*Significant difference in lay-off days, injury severity proportion, injury mechanism proportion, or recurrence proportion between injury types or injury locations.