Table 3.

Univariable and Multivariable linear regression analyses of factors influencing postoperative G-KJLO after HTO in derivation set (n = 50)

	Univariable analysis			Multivariable analysis
	β-coefficient	t-value	P-value	β-coefficient	t-value	P-value
Postoperative G-KJLO (°)
BMI	−0.030	−0.206	0.838
Preoperative G-KJLO (°)	0.673	3.069	< 0.001	0.560	5.882	< 0.001
Preoperative G-AJLO (°)	0.152	1.067	0.291
Preoperative TPI (°)	0.318	2.322	0.025	0.310	2.574	0.013
Preoperative MTFA (°)	−0.398	−3.009	0.004
Preoperative tibial width (mm)	−0.355	−2.628	0.011
Preoperative tibial length (mm)	−0.256	−1.838	0.072
Preoperative FCO (°)	−0.618	−5.447	< 0.001
Preoperative JSTA (°)	−0.059	−0.412	0.682
Preoperative FBA (°)	−0.440	−3.391	0.001
Correction angle (°) a	0.557	4.642	< 0.001	0.463	7.071	< 0.001

BMI Body mass index, G-KJLO Knee joint line orientation relative to the ground, G-AJLO Ankle joint line orientation relative to the ground, TPI Tibia plateau inclination, MTFA Mechanical tibiofemoral angle, FCO Femoral condylar orientation, JSTA Joint space tilting angle, FBA Femoral bowing angle, HTO High tibial osteotomy

^aCorrection angle was defined as the value derived from subtraction of preoperative TPI from postoperative TPI