Table 2.
Mean ± SD (PASS %) KOOS values for each dichotomized patient group in the included cohort (n = 2335 patients) at the 2-year follow-up
| Pain (PASS ≥ 88.9) | Symptoms (PASS ≥ 57.1) | ADL (PASS = 100) | Sport and recreation (PASS ≥ 75.0) | QoL (PASS ≥ 62.5) | |
|---|---|---|---|---|---|
| Pre-operative factors | |||||
| Age at surgery | |||||
| Age younger than 30 years | 87.9 ± 13.9 (56.4) | 81.4 ± 16.5 (92.3) | 94.2 ± 10.9 (44.6) | 73.4 ± 24.5 (61.3) | 65.6 ± 23.8 (64.5) |
| Age 30 years or older | 90.3 ± 12.3 (64.0) | 85.4 ± 14.4 (95.2) | 94.5 ± 10.4 (46.7) | 74.9 ± 24.7 (64.3) | 71.0 ± 21.4 (74.1) |
| Gender | |||||
| Male | 89.9 ± 13.2 (71.5) | 83.6 ± 15.9 (93.8) | 94.5 ± 10.9 (49.0) | 76.3 ± 23.5 (66.3) | 69.4 ± 23.3 (70.6) |
| Female | 88.1 ± 13.2 (65.0) | 82.9 ± 15.4 (93.6) | 94.2 ± 10.4 (42.1) | 71.8 ± 25.5 (59.0) | 66.8 ± 22.4 (67.4) |
| Time from injury to surgery | |||||
| ≤ 3 months | 89.0 ± 13.1 (69.1) | 82.3 ± 16.5 (92.8) | 94.6 ± 10.6 (48.8) | 74.8 ± 24.5 (64.2) | 68.1 ± 23.2 (69.7) |
| > 3 months | 89.0 ± 13.2 (67.9) | 83.6 ± 15.4 (94.0) | 94.3 ± 10.7 (44.5) | 73.9 ± 24.7 (62.2) | 68.2 ± 22.8 (68.8) |
| Pre-injury Tegner activity level | |||||
| High ≥ 6 | 89.0 ± 13.0 (67.8) | 83.0 ± 15.7 (93.4) | 94.5 ± 10.3 (45.4) | 74.6 ± 24.0 (62.9) | 68.1 ± 22.7 (68.9) |
| Low < 6 | 89.0 ± 13.7 (69.6) | 83.9 ± 15.0 (94.2) | 94.0 ± 11.6 (46.2) | 72.8 ± 26.3 (61.2) | 68.3 ± 23.4 (69.4) |
| Intra-operative factors | |||||
| Graft type | |||||
| HT autograft | 89.2 ± 12.8 (68.5) | 83.4 ± 15.0 (93.7) | 94.5 ± 10.3 (45.1) | 74.7 ± 24.2 (63.4) | 68.5 ± 22.5 (69.4) |
| BPTB autograft | 87.5 ± 16.0 (65.9) | 82.1 ± 18.1 (92.3) | 93.1 ± 13.6 (49.8) | 69.0 ± 28.0 (56.1) | 65.0 ± 25.8 (65.5) |
| No meniscus surgery | 89.1 ± 13.0 (68.6) | 83.6 ± 15.6 (93.8) | 94.4 ± 10.5 (45.7) | 74.2 ± 24.6 (62.5) | 68.5 ± 23.0 (70.3) |
| Medial meniscus surgery | |||||
| Resection | 89.9 ± 14.0 (73.2) | 85.0 ± 13.8 (96.2) | 94.6 ± 11.5 (49.2) | 75.8 ± 23.8 (66.7) | 69.8 ± 21.7 (71.0) |
| Repair | 85.3 ± 14.0 (54.7) | 78.0 ± 16.5 (88.4) | 93.4 ± 10.9 (37.8) | 68.0 ± 27.6 (55.8) | 62.3 ± 23.4 (57.9) |
| Lateral meniscus surgery | |||||
| Resection | 89.0 ± 14.0 (66.6) | 82.4 ± 16.2 (92.3) | 93.9 ± 12.5 (43.9) | 74.3 ± 24.1 (63.8) | 67.9 ± 23.0 (67.8) |
| Repair | 87.9 ± 13.0 (66.2) | 79.2 ± 20.0 (87.6) | 96.3 ± 6.1 (50.7) | 73.7 ± 26.5 (64.6) | 67.5 ± 23.1 (64.6) |
| Cartilage injury | |||||
| Yes | 89.2 ± 12.0 (68.0) | 82.9 ± 15.3 (93.6) | 94.1 ± 10.2 (42.2) | 72.3 ± 25.7 (59.3) | 68.1 ± 22.4 (69.1) |
| No | 89.0 ± 13.0 (68.4) | 83.4 ± 15.8 (93.7) | 94.4 ± 10.8 (46.1) | 74.5 ± 24.3 (63.6) | 68.2 ± 23.0 (69.1) |
| Post-operative factors (6 months) | |||||
| Isokinetic quadriceps strength | |||||
| LSI ≥ 90% | 90.3 ± 12.6 (73.6) | 85.3 ± 15.0 (95.4) | 95.6 ± 9.5 (51.7) | 78.1 ± 23.1 (70.5) | 71.2 ± 22.5 (74.5) |
| LSI < 90% | 88.4 ± 13.0 (65.8) | 82.3 ± 16.0 (92.8) | 93.8 ± 11.1 (42.6) | 72.1 ± 25.1 (58.9) | 66.7 ± 22.9 (66.4) |
| Isokinetic hamstring strength | |||||
| LSI ≥ 90% | 89.4 ± 13.0 (70.4) | 83.4 ± 15.9 (93.2) | 94.7 ± 10.9 (47.7) | 75.5 ± 24.3 (65.2) | 69.0 ± 23.0 (70.7) |
| LSI < 90% | 88.7 ± 13.0 (66.3) | 83.2 ± 15.5 (93.9) | 94.0 ± 10.4 (43.6) | 72.8 ± 24.8 (60.3) | 67.4 ± 22.8 (67.5) |
| Single-leg-hop test | |||||
| LSI ≥ 90% | 90.0 ± 12.0 (70.6) | 84.1 ± 15.5 (94.4) | 95.5 ± 8.9 (49.5) | 77.5 ± 22.4 (67.7) | 70.2 ± 22.3 (72.1) |
| LSI < 90% | 87.7 ± 14.0 (65.1) | 82.1 ± 15.9 (92.6) | 92.9 ± 12.5 (40.2) | 69.6 ± 26.6 (55.9) | 65.3 ± 23.2 (64.9) |
KOOS Knee injury and Osteoarthritis Outcome Score; PASS patient-acceptable symptom state; ADL activities of daily living; QoL quality of life; SD standard deviation; HT hamstring tendon; BPTB bone-patellar tendon bone; LSI limb symmetry index