Table 1.
Patient characteristics (n = 4093 Patients)
| Quadriceps strength ratio | Hamstring strength ratio | Single-leg-hop test ratioa | |||||
|---|---|---|---|---|---|---|---|
| Mean ± SD | LSI ≥ 90% | Mean ± SD | LSI ≥ 90% | Mean ± SD | LSI ≥ 90% | ||
| Preoperative factors | |||||||
| Age at surgery, years, mean ± SD | 28.3 ± 10.7 | ||||||
| Aged younger than 30 years | 20.7 ± 4.7; 2408 (58.8) | 86.5 ± 14.8 | 992 (41.2) | 91.0 ± 22.4 | 1194 (49.6) | 94.2 ± 10.8 | 1579 (72.7) |
| Aged 30 years or older | 39.1 ± 6.9; 1685 (41.2) | 81.5 ± 16.4 | 445 (26.4) | 88.6 ± 15.4 | 741 (44.0) | 90.2 ± 15.0 | 828 (60.4) |
| Gender | |||||||
| Male | 2223 (54.3) | 84.8 ± 15.9 | 804 (36.2) | 90.7 ± 22.8 | 1078 (48.5) | 93.4 ± 12.2 | 1377 (71.5) |
| Female | 1870 (45.7) | 84.0 ± 15.4 | 633 (33.8) | 89.2 ± 15.6 | 856 (45.8) | 91.7 ±13.5 | 1029 (63.7) |
| Time from injury to surgery, months, mean ± SD | 16.9 ± 29.8 | ||||||
| ≤ 3 months | 646 (15.8) | 84.0 ± 15.2 | 234 (36.2) | 91.1 ± 12.6 | 342 (52.9) | 94.4 ± 10.0 | 439 (75.8) |
| > 3 months | 3447 (84.2) | 84.6 ± 15.6 | 1202 (34.9) | 89.6 ± 16.0 | 1593 (46.2) | 92.3 ± 13.3 | 1967 (66.4) |
| Pre-injury Tegner activity level, median (range) | 7 (1–10) | ||||||
| High, ≥ 6 | 3618 (88.4) | 84.7 ± 15.2 | 1286 (35.6) | 90.0 ± 15.2 | 1733 (47.9) | 93.1 ± 12.6 | 2208 (69.7) |
| Low, < 6 | 475 (11.6) | 82.7 ± 17.8 | 150 (31.6) | 88.5 ± 17.8 | 206 (43.4) | 88.8 ± 13.9 | 199 (53.3) |
| Intraoperative factors | |||||||
| Graft type | |||||||
| HT autograft | 3788 (92.5) | 85.1 ± 15.2 | 1387 (36.6) | 89.3 ± 15.3 | 1726 (45.6) | 92.8 ± 12.7 | 2267 (68.8) |
| BPTB autograft | 305 (7.5) | 76.1 ± 17.1 | 49 (16.1) | 96.6 ±16.8 | 209 (68.5) | 89.9 ± 13.4 | 141 (57.5) |
| No meniscus surgery | 2577 (63.0) | 84.7 ± 15.9 | 906 (35.2) | 89.9 ± 15.1 | 1210 (47.0) | 93.0 ± 12.8 | 1502 (58.3) |
| Medial meniscus surgery | |||||||
| Resection | 578 (14.1) | 84.0 ± 14.8 | 178 (30.8) | 88.7 ± 15.3 | 258 (44.6) | 90.3 ± 13.9 | 298 (60.9) |
| Repair | 194 (4.7) | 81.9 ± 15.6 | 53 (27.3) | 89.7 ± 13.9 | 92 (47.4) | 91.6 ± 11.4 | 105 (61.4) |
| Lateral meniscus surgery | |||||||
| Resection | 594 (14.5) | 84.2 ± 13.9 | 208 (35.0) | 89.5 ± 13.9 | 281 (47.3) | 93.1 ± 10.7 | 364 (61.3) |
| Repair | 150 (3.7) | 82.3 ± 14.4 | 43 (28.7) | 92.6 ± 20.6 | 71 (47.3) | 92.8 ± 16.6 | 80 (62.5) |
| Cartilage injury | |||||||
| Yes | 738 (18.3) | 82.3 ± 16.6 | 222 (30.1) | 88.3 ± 14.9 | 308 (41.7) | 90.5 ± 14.4 | 362 (60.4) |
| No | 3355 (81.7) | 84.9 ± 15.3 | 1214 (36.2) | 90.2 ± 15.7 | 1631 (48.6) | 93.1 ± 12.4 | 2044 (69.5) |
Data are reported as n (%), unless otherwise indicated
HT hamstring tendon, BPTB bone–patellar tendon–bone, LSI limb symmetry index, SD standard deviation
aData available for 3541 patients