Table 5.

Correlations between ΔLL and ΔSVA according to the L3–4, L4–5, and L5–S1-segment fusion

Variable	Category	ΔLL (°)	ΔSVA (mm)	p-value	CC
L3–4	PO 1 yr–preop	7.1±8.6	15.6±6.4	0.04*	0.062
	PO 2 yr–preop	6.5±9.9	10.8±8.9	0.05*	0.043
L4–5	PO 1 yr–preop	9.2±9.3	20.7±7.4	<0.01*	0.123
	PO 2 yr–preop	8.5±10.7	18.9±6.9	<0.01*	0.104
L5–S1	PO 1 yr–preop	10.5±10.5	28.5±8.2	<0.01*	0.194
	PO 2 yr–preop	10.9±10.8	24.3±7.9	<0.01*	0.172

Values are presented as mean±standard deviation, unless otherwise stated.

LL, lumbar lordosis; SVA, sagittal vertical axis; ΔLL, postoperative LL–preoperative LL; ΔSVA, preoperative SVA–postoperative SVA; CC, correlation coefficient; PO, postoperative; Preop, preoperative.

^*p<0.05; statistical significance.