Distribution of reinjuries among acute hamstring injuries
| All participants | Qatar cohort | Dutch cohort | ||||
| n | Reinjuries ≤12 months | n | Reinjuries ≤12 months | n | Reinjuries ≤12 months | |
| Overall | 165 | 32 (19%) | 90 | 11 (12%) | 75 | 21 (28%) |
| No tendon disruption | 96 | 19 (20%) | 53 | 6 (11%) | 43 | 13 (30%) |
| Free tendon disruption | 5 | 0 (0%) | 5 | 0 (0%) | 0 | 0 (NA) |
| Intramuscular tendon disruption | 64 | 13 (20%) | 32 | 5 (16%) | 32 | 8 (25%) |
| <50% of tendon CSA | 12 | 2 (17%) | 5 | 0 (0%) | 7 | 2 (29%) |
| 50%–99% of tendon CSA | 28 | 8 (29%) | 14 | 3 (21%) | 14 | 5 (36%) |
| 100% of tendon CSA | 24 | 3 (13%) | 13 | 2 (15%) | 11 | 1 (9%) |
| No waviness | 128 | 25 (20%) | 71 | 8 (11%) | 57 | 17 (30%) |
| Waviness | 37 | 7 (19%) | 19 | 3 (16%) | 18 | 4 (22%) |
CSA, cross-sectional area; NA, not applicable.