Table II.
Distribution and mean alignment angles of 214 healthy knees for each type in the original coronal plane alignment of the knee classification.
| CPAK | n, (%) | Mean mHKA, ° (SD) | Mean LDFA, ° (SD) | Mean MPTA, ° (SD) | Mean AA-MA, ° (SD) | Mean aHKA, ° (SD) | Mean JLO, ° (SD) | Mean aJLO, ° (SD) |
|---|---|---|---|---|---|---|---|---|
| I | 78 (36.4) | -3.8 (1.7) | 88.4 (1.6) | 84.0 (1.6) | 5.2 (1.4) | -4.5 (2.1) | 172.3 (2.8) | 3.8 (1.4) |
| II | 84 (39.3) | -0.0 (1.2) | 86.4 (1.6) | 86.1 (1.4) | 4.2 (1.2) | -0.3 (1.8) | 172.5 (2.8) | 3.7 (1.4) |
| III | 29 (13.6) | 3.5 (1.1) | 84.4 (1.5) | 87.9 (1.8) | 3.4 (1.7) | 3.9 (1.0) | 172.3 (3.1) | 3.8 (1.5) |
| IV | 12 (5.6) | -4.9 (3.0) | 91.9 (1.7) | 86.6 (1.3) | 6.2 (2.2) | -5.2 (2.2) | 178.5 (0.9) | 0.8 (0.5) |
| V | 10 (4.7) | 0.2 (1.2) | 89.4 (0.7) | 89.1 (0.8) | 4.4 (1.1) | -0.5 (1.4) | 178.5 (1.1) | 0.7 (0.6) |
| VI | 1 (0.5) | 5.5 | 86.5 | 93.2 | 5.4 | 6.7 | 179.7 | 0.15 |
aHKA, arithmetic hip-knee-ankle angle; aJLO, actual joint line obliquity; CPAK, Coronal Plane Alignment of the Knee; JLO, joint line obliquity; LDFA, lateral distal femoral angle; MA-AA, angle between femoral anatomical axis and mechanical axis; mHKA, mechanical hip-knee-ankle angle; MPTA, medial proximal tibial angle; SD, standard deviation.