Outcome scores in medial parapatellar and subvastus approach patients up to 2 years postoperative
| Outcome | Group; mean ± SD | p value | |
|---|---|---|---|
| MPA | SV | ||
| SF-12 MCS, 1 yr postop | 56.7 ± 11.5 | 58.0 ± 2.3 | 0.82 |
| SF-12 MCS, 2 yr postop | 53.7 ± 10.3 | 52.2 ± 8.8 | 0.82 |
| SF-12 PCS, 1 yr postop | 45.4 ± 13.2 | 43.1 ± 13.1 | 0.77 |
| SF-12 PCS, 2 yr postop | 38.6 ± 11.5 | 53.2 ± 5.1 | 0.036 |
| WOMAC pain, 1 yr postop | 71.4 ± 26.3 | 86.4 ± 19.3 | 0.25 |
| WOMAC pain, 2 yr postop | 72.5 ± 20.6 | 98.0 ± 2.7 | 0.09 |
| WOMAC stiffness, 1 yr postop | 62.5 ± 29.8 | 75.0 ± 21.6 | 0.39 |
| WOMAC stiffness, 2 yr postop | 56.3 ± 12.5 | 85.0 ± 13.7 | 0.014 |
| WOMAC function, 1 yr postop | 74.1 ± 25.2 | 84.6 ± 18.7 | 0.41 |
| WOMAC function, 2 yr postop | 65.9 ± 26.2 | 94.4 ± 6.9 | 0.12 |
| WOMAC total, 1 yr postop | 72.5 ± 27.0 | 83.3 ± 18.5 | 0.41 |
| WOMAC total, 2 yr postop | 66.7 ± 19.8 | 94.0 ± 5.8 | 0.07 |
| Extension, °, 1 yr postop | 0.8 ± 2.0 | 0 ± 0 | 0.39 |
| Extension, °, 2 yr postop | 1.7 ± 2.9 | 0 ± 0 | 0.42 |
| Flexion, °, 1 yr postop | 126.7 ± 4.1 | 114.0 ± 8.2 | 0.022 |
| Flexion, °, 2 yr postop | 110.0 ± 21.8 | 121.0 ± 2.2 | 0.47 |
| KSS function, 1 yr postop | 90.7 ± 14.3 | 85.0 ± 28.1 | 0.65 |
| KSS function, 2 yr postop | 66.7 ± 28.9 | 98.0 ± 4.5 | 0.20 |
| KSS knee, 1 yr postop | 97.3 ± 2.58 | 94.8 ± 2.9 | 0.16 |
| KSS knee, 2 yr postop | 72.7 ± 25.7 | 97.8 ± 2.5 | 0.23 |
| KSS total, 1 yr postop | 186.5 ± 16.8 | 176.8 ± 31.5 | 0.56 |
| KSS total, 2 yr postop | 139.3 ± 53.5 | 195.3 ± 4.8 | 0.21 |
KSS = Knee Society Score; MPA = medial parapatellar approach; SF-12 MCS = Short-Form 12 Mental Composite Score; SF-12 PCS = Short-Form 12 Physical Composite Score; SV = subvastus approach; WOMAC = Western Ontario and MacMaster Universities Osteoarthritis Index.