Analysis of Lumbar Sagittal Curvature in Spinal Decompression and Fusion for Lumbar Spinal Stenosis Patients under Roussouly Classification

Table 2

Statistical analysis of pre and postoperative parameters (GL, GK, and SVA) of patients in four types.

Roussouly classification	GL (°)		GK (°)		SVA (mm)
	Preoperative	Postoperative	Preoperative	Postoperative	Preoperative	Postoperative
Type I
value	-104.009		-108.538		270.535
value	<0.001		<0.001		<0.001
Type II
value	-47.274		-67.479		52.904
value	<0.001		<0.001		<0.001
Type III
value	-1.769		-1.015		111.426
value	0.096		0.325		<0.001
Type IV
value	1.225		-1.844		-33.120
value	0.241		0.086		<0.001

GL: global lordosis; GK; global kyphosis; SVA: sagittal vertical axis.