Table 1
Comparison of radiographic parameters between knees with MPTA <95° and ≥95° after opening wedge high tibial osteotomy.
| Variable | Overall | MPTA < 95° | MPTA ≥ 95° | p-value |
|---|---|---|---|---|
| (n = 300) | (n = 178) | (n = 122) | ||
| Age, y | 66.9 ± 8.6 | 66.3 ± 8.9 | 67.8 ± 8.2 | 0.210 |
| Male/female, n | 100/200 | 62/116 | 38/84 | 0.506 |
| Body mass index, kg/m2 | 25.9 ± 4.0 | 25.8 ± 4.1 | 26.1 ± 3.9 | 0.328 |
| Preoperatively planned correction angle, ° | 10.1 ± 3.6 | 8.5 ± 2.9 | 12.5 ± 3.1 | < 0.001 |
| Preoperative WBLR, % | 18.0 ± 13.9 | 19.9 ± 12.5 | 15.1 ± 15.2 | 0.002 |
| Preoperative LDFA, ° | 87.9 ± 2.3 | 87.3 ± 2.2 | 88.7 ± 2.2 | < 0.001 |
| Preoperative MPTA, ° | 84.3 ± 2.6 | 83.8 ± 2.4 | 85.0 ± 2.8 | < 0.001 |
| Preoperative KJLCA, ° | 3.6 ± 2.2 | 3.2 ± 2.0 | 4.1 ± 2.3 | < 0.001 |
| Preoperative KJLO, ° | −0.1 ± 2.9 | −1.0 ± 1.3 | 1.3 ± 2.9 | < 0.001 |
| Preoperative AJLO, ° | 7.0 ± 4.5 | 6.7 ± 4.1 | 7.5 ± 5.0 | 0.121 |
| Preoperative HAA, ° | 1.5 ± 2.4 | 1.5 ± 2.4 | 1.6 ± 2.4 | 0.549 |
| Preoperative TAA, ° | 5.6 ± 3.0 | 5.2 ± 2.6 | 6.2 ± 3.5 | 0.009 |
| Postoperative WBLR, % | 66.5 ± 12.4 | 62.9 ± 11.7 | 71.8 ± 11.6 | < 0.001 |
| Postoperative MPTA, ° | 94.4 ± 3.4 | 92.2 ± 2.1 | 97.6 ± 2.2 | < 0.001 |
| Postoperative KJLCA, ° | 2.4 ± 1.9 | 2.0 ± 1.8 | 2.9 ± 1.9 | < 0.001 |
| Postoperative KJLO, ° | 2.8 ± 3.1 | 1.5 ± 2.5 | 4.8 ± 2.7 | < 0.001 |
| Postoperative KJLO ≥ 5°, n (%) | 77 (25.7) | 19 (10.7) | 58 (47.5) | < 0.001 |
| Postoperative AJLO, ° | −0.4 ± 4.5 | 0.0 ± 4.2 | −0.1 ± 4.7 | 0.088 |
| Postoperative HAA, ° | −3.0 ± 2.3 | −2.5 ± 2.3 | −3.8 ± 2.2 | < 0.001 |
| Postoperative TAA, ° | −1.6 ± 2.9 | −0.8 ± 2.7 | −2.8 ± 2.7 | < 0.001 |
Mean ± standard deviation values are shown for continuous variables.
WBLR, weight-bearing line ratio; LDFA, lateral distal femoral angle; MPTA, medial proximal tibial angle; KJLCA, knee joint line convergence angle; KJLO, knee joint line obliquity; AJLO, ankle joint line obliquity; HAA, hip abduction angle; TAA, tibial axis angle.
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