Concurrent injuries and intraoperative findings for primary anterior cruciate ligament (ACL) reconstructions
| Characteristic, n (%) | Denmark | Luxembourg* | Norway | Sweden | UK | US |
| Total N | 21 820 | 300 | 17 556 | 30 422 | 2972 | 28 055 |
| None—isolated ACL tear | 10 015 (45.9) | 80 (26.7) | 6589 (37.5) | 13 551 (44.5) | 1862 (62.7) | 8446 (30.1) |
| ALL | – | – | – | – | 5 (0.2) | – |
| LCL | 310 (1.4) | 3 (1.0) | 283 (1.7) | 468 (1.5) | 32 (1.1) | – |
| MCL | 320 (1.5) | 2 (0.7) | 1248 (7.1) | 1289 (4.2) | – | 515 (1.8) |
| PCL | 254 (1.2) | 1 (0.3) | 285 (1.6) | 522 (1.7) | 6 (0.2) | 195 (0.7) |
| PLRI | 277 (1.3) | – | – | – | 16 (0.5) | 157 (0.6) |
| Other | 235 (1.1) | – | 172 (1.0) | – | – | 182 (0.6) |
| Meniscus pathology | ||||||
| Lateral meniscus tear only | 4561 (20.9) | 126 (42.0) | 2800 (15.9) | 5151 (16.9) | 336 (11.3) | 6341 (22.6) |
| Medial meniscus tear only | 5390 (24.7) | 101 (33.7) | 4004 (22.8) | 5765 (19.0) | 448 (15.1) | 6593 (23.5) |
| Both menisci injured | – | 40 (13.3) | 1718 (9.8) | 2077 (6.8) | 150 (5.0) | 4415 (15.7) |
| Articular cartilage injury | 4364 (20.0) | 99 (33.0) | 4175 (23.8) | 8088 (26.6) | 106 (3.6) | 7733 (27.6) |
| Meniscus† and cartilage injury | – | 72 (24.0) | 2813 (16.0) | 4554 (15.0) | 51 (1.7) | 5772 (20.6) |
*Missing data: isolated ACL tear=4 (1.3%), lateral meniscal tear only=8 (2.7%), medial meniscal tear only=9 (3.0%), both menisci injured=15 (5.0%), articular cartilage injury=18 (6.0%), and meniscal and cartilage injury=3 (1.0%).
†Lateral or medial meniscus injuries included.
–, not reported; ALL, anterolateral ligament; LCL, lateral collateral ligament; MCL, medial collateral ligament; PCL, posterior cruciate ligament; PLRI, posterolateral rotatory instability.