Table 1 Baseline characteristics of the study groups
Clinical characteristics | Derivation set (n = 50) | Validation set (n = 20) | ||
|---|---|---|---|---|
Mean | SD (range) | Mean | SD (range) | |
Age (years) | 55.5 | 4.9 (39 to 64) | 57.6 | 4.3 (48 to 66) |
Male (n) | 5 (12.1%) | 4(20%) | ||
BMI | 26.1 | 3.2 (20.3 to 32.7) | 27.3 | 2.6 (20.5 to 31.9) |
Left operation (n) | 30 (60%) | 12 (60%) | ||
Preoperative G-KJLO (°) | − 0.8 | 2.4 (− 5.6 to 3.9) | − 3.3 | 2.63 (− 7.6 to 3.4) |
Preoperative G-AJLO (°) | 8.4 | 3.3 (0.8 to 15) | 10.1 | 2.8 (3.1 to 12.1) |
Preoperative TPI (°) | −5.7 | 2.0 (−10.5 to − 2.5) | −6.5 | 2.1 (− 9.8 to − 1.3) |
Preoperative MTFA (°) | −7.7 | 2.1 (−12.9 to − 2.3) | −7.8 | 2.9 (−14 to − 2.6) |
Preoperative TW (mm) | 73.1 | 4.4 (66.7 to 86) | 74.2 | 7.2 (65.9 to 89.4) |
Preoperative TL (mm) | 340.5 | 21.7 (296 to 392) | 334.1 | 13.8 (308.1 to 349.4) |
Preoperative FCO (°) | 1.7 | 2.0 (−2.6 to 5.6) | − 0.01 | 2.6 (−5 to 4) |
Preoperative JSTA (°) | −3.6 | 2.2 (−9.6 to − 0.1) | − 2.6 | 1.8 (−6 to 0.3) |
Preoperative FBA (°) | −0.07 | 3.1 (−7.4 to 7.1) | 1.37 | 2.3 (− 4.4 to 5.02) |
Correction angle (°)a | 9.1 | 2.1 (7.0 to 15.2) | 9.5 | 3.7 (4.5 to 19.6) |