HKA | Varus | Neutral | Valgus | Agreement rate (%) | P value |
---|---|---|---|---|---|
FTA calculated in this study | |||||
 Varus (FTA < 3.7°) | 102 | 10 | – | 79.8 | 0.54 |
 Neutral (3.7° ≤ FTA ≤ 9.5°) | 24 | 70 | 8 |  |  |
 Valgus (FTA > 9.5°) | – | 3 | 6 |  |  |
FTA reported by Morgan | |||||
 Varus (FTA < 4°) | 107 | 11 | – | 82.5 |  |
 Neutral (4° ≤ FTA ≤ 9°) | 19 | 68 | 5 |  |  |
 Valgus (FTA > 9°) | – | 4 | 9 |  |  |
FTA reported by Kim | |||||
 Varus (FTA < 3°) | 85 | 7 | – | 72.2 | 0.013 |
 Neutral (3° ≤ FTA ≤ 7.5°) | 41 | 65 | 3 |  |  |
 Valgus (FTA > 7.5°) | – | 11 | 11 |  |  |
FTA reported by Ritter | |||||
 Varus (FTA < 2.4°) | 74 | 4 | – | 68.2 | 0.0006 |
 Neutral (2.4° ≤ FTA ≤ 7.2°) | 52 | 66 | 2 |  |  |
 Valgus (FTA > 7.2°) | – | 12 | 12 |  |  |