Table 4.

Logistic regression analysis of preoperative parameters for two-level osteotomy selection

Variables	B	SE	Wald	P value	Exp (B)	95% Confidence interval
						Lower	Upper
Preoperative CBVA	0.043	0.014	9.327	0.002	1.044	1.016	1.074
Preoperative GK	0.062	0.024	6.863	0.009	1.064	1.016	1.114
Constant	−9.587	2.344	16.730	< 0.001	0.000	-	-

Using the method of forward LR analysis; CBVA, chin-brow vertical angle; GK, global kyphosis. Significance set as P < 0.05