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

Table 3

Statistical analysis of pre- and post-operative parameters (PI, PT, and SS) of patients in four types.

Roussouly classification	PI (°)		PT (°)		SS (°)
	Preoperative	Postoperative	Preoperative	Postoperative	Preoperative	Postoperative
Type I
value	-0.558		142.830		-10.796
value	0.580		<0.001		<0.001
Type II
value	-1.500		124.418		-11.134
value	0.137		<0.001		<0.001
Type III
value	-0.794		1.140		-26.882
value	0.439		0.271		<0.001
Type IV
value	1.604		-11.155		6.472
value	0.131		<0.001		<0.001

PI; pelvic incidence; PT: pelvic tilt; SS: sacral slope.