Types of injury during the total follow-up period according to the occurrence of concussion
| Concussion (n=66) | No concussion (n=1599) | |
|---|---|---|
| Concussion | 71 (9%) | 0 (0%) |
| Head/neck fracture | 7 (1%) | 48 (1%) |
| Shoulder sprain/dislocation | 5 (1%) | 95 (1%) |
| Shoulder/arm/elbow fracture | 3 (0%) | 13 (0%) |
| Forearm/wrist/hand fracture | 8 (1%) | 41 (1%) |
| Rib/chest wall injury | 9 (1%) | 71 (1%) |
| Lumbar/thoracic fracture | 3 (0%) | 13 (0%) |
| Lumbar/thoracic spine injury | 29 (4%) | 276 (3%) |
| Groin strain/osteitis pubis | 68 (9%) | 993 (13%) |
| Hip-joint injury | 9 (1%) | 45 (1%) |
| Hamstring muscle injury | 93 (12%) | 1269 (16%) |
| Hip/thigh contusion | 21 (3%) | 224 (3%) |
| Quadriceps muscle injury | 42 (6%) | 489 (6%) |
| Knee ACL injury | 4 (1%) | 66 (1%) |
| Knee/patellar tendon injury | 14 (2%) | 188 (2%) |
| Knee MCL injury | 30 (4%) | 354 (4%) |
| Knee osteochondral/meniscus injury | 15 (2%) | 201 (3%) |
| Other knee injury | 24 (3%) | 248 (3%) |
| Other knee sprain/dislocation | 11 (1%) | 123 (2%) |
| Knee/leg/ankle/foot contusion | 80 (11%) | 768 (10%) |
| Achilles tendon injury | 13 (2%) | 207 (3%) |
| Calf muscle injury | 38 (5%) | 439 (6%) |
| Leg/foot fracture/stress fracture | 14 (2%) | 131 (2%) |
| Other leg/ankle/foot injury | 14 (2%) | 218 (3%) |
| Ankle sprain/joint injury | 86 (11%) | 843 (11%) |
| Foot sprain/joint injury | 3 (0%) | 62 (1%) |
| Other injuries | 42 (6%) | 514 (7%) |
| Total | 756 (100%) | 7939 (100%) |
Data are presented as n (%).
ACL, anterior cruciate ligament; MCL, medial collateral ligament.