Table 2.
Pre- and postoperative function scores and thigh musculature strength for the two groups
| Score/Strength | Mini-subvastus approach | Medial parapatellar approach | ||||
|---|---|---|---|---|---|---|
| Preoperative | Two months postoperative | p value | Preoperative | Two months postoperative | p value | |
| KSS (points) | ||||||
| Total (/100) | 49 ± 14 | 81 ± 7 | < 0.0001 | 46 ± 12 | 76 ± 14 | < 0.0001 |
| Function (/100) | 58 ± 9 | 81 ± 10 | < 0.0001 | 59 ± 8 | 81 ± 16 | < 0.0001 |
| Pain (/100) | 19 ± 8 | 47 ± 5 | < 0.0001 | 19 ± 7 | 44 ± 10 | < 0.0001 |
| KOOS (points) | ||||||
| Pain (/100) | 17 ± 5 | 27 ± 6 | < 0.0001 | 18 ± 5 | 30 ± 6 | < 0.0001 |
| Symptoms (/100) | 15 ± 4 | 20 ± 5 | 0.003 | 16 ± 3 | 24 ± 5 | < 0.0001 |
| ADL (/100) | 30 ± 9 | 52 ± 8 | < 0.0001 | 29 ± 7 | 52 ± 12 | < 0.0001 |
| Sports (/100) | 13 ± 5 | 21 ± 4 | 0.003 | 17 ± 5 | 20 ± 4 | 0.900 |
| QOL (/100) | 9 ± 2 | 16 ± 3 | < 0.0001 | 11 ± 3 | 18 ± 3 | < 0.0001 |
| SF-12 (points) | ||||||
| Physical subscale (/100) | 30 ± 8 | 41 ± 8 | 0.002 | 32 ± 6 | 44 ± 7 | < 0.0001 |
| Mental subscale (/100) | 54 ± 9 | 56 ± 7 | 0.600 | 54 ± 8 | 56 ± 6 | 0.603 |
| UCLA activity level | 4 ± 1 | 7 ± 1 | < 0.0001 | 4 ± 1 | 6 ± 1 | < 0.0001 |
| Strength of thigh musculature (Nm) | ||||||
| Involved knee extension | 73.51 ± 11.98 | 89.26 ± 13.02 | 0.022 | 71.23 ± 12.19 | 85.35 ± 12.02 | 0.038 |
| Noninvolved knee extension | 104.51 ± 14.62 | 104.61 ± 14.29 | 0.983 | 101.12 ± 16.63 | 106.22 ± 16.59 | 0.160 |
| p value | 0.002 | 0.007 | 0.007 | 0.002 | ||
| Involved knee flexion | 52.14 ± 19.78 | 53.87 ± 19.51 | 0.630 | 49.84 ± 12.64 | 53.25 ± 12.02 | 0.468 |
| Noninvolved knee flexion | 62.93 ± 13.50 | 61.15 ± 12.77 | 0.666 | 63.19 ± 15.06 | 62.36 ± 12.06 | 0.826 |
| p value | 0.009 | 0.010 | 0.005 | 0.009 | ||
Values are expressed as mean ± SD; KSS = Knee Society Score; KOOS = Knee Injury and Osteoarthritis Outcome Score; ADL = activity of daily living; QOL = quality of life.