Table 1.
Descriptive statistics regarding absence days for the 31 most common index injuries. The injuries are arranged according to their median absence
| Injury | Frequency (% of total) | Mean (95% CI) | Median (95% CI) | 25th;75th percentile | 10th;90th percentile | Re-injury rate (%) |
| Thigh contusion | 651 (3.3) | 6.4 (5.6 to 7.1) | 4.0 (3.0 to 4.0) | 2.0;7.0 | 1.0;12.0 | 1.4 |
| Foot contusion | 537 (2.7) | 6.8 (5.9 to 7.6) | 4.0 (4.0 to 4.0) | 2.0;7.0 | 1.0;14.0 | 4.1 |
| Knee contusion | 465 (2.3) | 6.1 (5.3 to 6.9) | 4.0 (4.0 to 4.0) | 2.0;7.0 | 1.0;13.0 | 2.8 |
| Low back pain | 405 (2.0) | 8.3 (6.7 to 10.0) | 4.0 (4.0 to 5.0) | 2.0;8.0 | 1.0;14.0 | 18.8 |
| Ankle contusion | 385 (1.9) | 5.9 (5.1 to 6.7) | 4.0 (3.0 to 4.0) | 2.0;6.0 | 1.0;11.0 | 2.6 |
| Calf contusion | 314 (1.6) | 6.2 (5.1 to 7.3) | 4.0 (3.0 to 4.0) | 2.0;6.0 | 2.0;12.0 | 1.3 |
| Ankle joint capsular injury | 287 (1.4) | 8.3 (7.0 to 9.6) | 4.0 (4.0 to 5.0) | 3.0;10.0 | 2.0;20.0 | 10.8 |
| Quadriceps muscle injury (functional) | 218 (1.1) | 4.9 (4.3 to 5.5) | 4.0 (3.0 to 4.0) | 2.0;6.0 | 1.0;9.0 | 13.8 |
| Calf muscle injury (functional) | 215 (1.1) | 5.6 (4.9 to 6.3) | 4.0 (4.0 to 5.0) | 2.0;7.0 | 1.0;12.0 | 15.3 |
| Lower leg contusion | 200 (1.0) | 6.1 (5.0 to 7.1) | 4.0 (3.0 to 5.0) | 2.0;7.5 | 1.0;14.0 | 2.0 |
| Hamstring muscle injury (functional) | 709 (3.6) | 5.9 (5.5 to 6.2) | 5.0 (4.0 to 5.0) | 3.0;7.0 | 2.0;11.0 | 16.1 |
| Groin pain | 256 (1.3) | 13.5 (10.2 to 16.8) | 5.0 (5.0 to 7.0) | 3.0;12.5 | 1.0;26.0 | 32.4 |
| Concussion | 235 (1.2) | 8.7 (6.6 to 10.8) | 5.0 (5.0 to 6.0) | 4.0;8.0 | 2.0;14.0 | 5.5 |
| Ankle joint synovitis | 128 (0.6) | 10.8 (7.8 to 13.7) | 5.0 (5.0 to 7.0) | 3.0;11.0 | 1.0;20.0 | 38.3 |
| Achilles tendon pain | 370 (1.9) | 18.4 (14.3 to 22.6) | 6.0 (5.0 to 7.0) | 3.0;15.0 | 2.0;42.0 | 38.4 |
| Knee joint synovitis | 279 (1.4) | 11.6 (9.7 to 13.6) | 6.0 (5.0 to 7.0) | 4.0;13.0 | 2.0;27.0 | 48.0 |
| Knee joint capsular injury | 143 (0.7) | 12.8 (9.0 to 16.7) | 6.0 (5.0 to 7.0) | 3.0;13.0 | 2.0;24.0 | 10.5 |
| Knee patellar tendinopathy | 231 (1.2) | 17.9 (13.5 to 22.3) | 7.0 (6.0 to 8.0) | 3.0;16.0 | 2.0;44.0 | 33.3 |
| Groin other muscle-related or tendon-related pain | 216 (1.1) | 13.4 (10.2 to 16.5) | 7.0 (6.0 to 8.0) | 4.0;15.0 | 2.0;30.0 | 6.9 |
| Ankle medial ligament injury | 196 (1.0) | 13.4 (11.2 to 15.7) | 7.0 (6.0 to 9.0) | 4.0;15.0 | 3.0;34.0 | 13.3 |
| Groin adductor pain | 1754 (8.8) | 13.5 (12.6 to 14.4) | 8.0 (8.0 to 9.0) | 4.0;15.0 | 2.0;27.0 | 17.7 |
| Ankle lateral ligament injury | 1260 (6.3) | 14.9 (13.7 to 16.0) | 8.0 (7.0 to 9.0) | 4.0;18.0 | 2.0;32.0 | 13.7 |
| Hip flexor pain | 264 (1.3) | 13.8 (11.6 to 15.9) | 8.0 (7.0 to 10.0) | 4.0;18.0 | 2.0;29.0 | 13.3 |
| Hamstring muscle injury (structural) | 2379 (13.8) | 18.0 (17.2 to 18.8) | 13.0 (12.0 to 14.0) | 7.0;22.0 | 4.0;36.0 | 17.5 |
| Quadriceps muscle injury (structural) | 914 (4.6) | 19.5 (18.1 to 20.9) | 13.0 (12.0 to 14.0) | 7.0;23.0 | 4.0;41.0 | 15.6 |
| Calf muscle injury (structural) | 818 (4.1) | 17.4 (16.3 to 18.6) | 13.0 (12.0 to 14.0) | 8.0;22.0 | 4.0;35.0 | 14.4 |
| Knee LCL injury | 146 (0.7) | 23.8 (18.9 to 28.7) | 13.0 (9.0 to 19.0) | 6.0;30.0 | 4.0;56.0 | 10.3 |
| Knee MCL injury | 760 (3.8) | 24.6 (22.6 to 26.6) | 16.0 (15.0 to 18.0) | 7.0;35.5 | 3.0;56.0 | 10.3 |
| Knee cartilage injury | 223 (1.1) | 48.7 (40.3 to 57.1) | 22.0 (15.0 to 30.0) | 8.0;62.0 | 4.0;134.0 | 36.3 |
| Knee lateral meniscus injury | 128 (0.6) | 50.1 (41.8 to 58.4) | 36.0 (29.0 to 42.0) | 18.5.0;65.5 | 8.0;128.0 | 23.4 |
| Knee ACL injury | 183 (0.9) | 210.2 (197.9 to 222.6) | 205.0 (198.0 to 218.0) | 173.0;238.0 | 129.0;292.0 | 6.6 |
ACL, anterior cruciate ligament; LCL, lateral collateral ligament; MCL, medial collateral ligament