Effect of osteoarthritic knee flexion deformity correction by total knee arthroplasty on sagittal spinopelvic alignment in Indian population

Table 3 Showing sub-group analysis of unilateral and bilateral total knee arthroplasty

No.	Variable	Unilateral, n = 10			Bilateral, n = 22
		Pre-op, median (IQR)	Post-op, median (IQR)	P value	Pre-op, median (IQR)	Post-op, median (IQR)	P value
1	PT	14 (10.1-23.4)	13.8 (9.4-21.4)	0.625	14.5 (9.8-18.3)	14.1 (11.2-17.2)	0.406
2	PI	51.1 (44.4-54.3)	52 (41.6-63.0)	0.193	48.5 (43.7-56.1)	49.5 (44.5-54.9)	0.384
3	SS	36.7 (28.6-38.5)	37.2 (27.9-43.9)	0.322	35.7 (28.9-41.7)	36.4 (28.4-39.8)	0.943
4	LL	-44.5 (-55.4 to -38.2)	-48 (-57.8 to -36)	0.959	-47.5 (-54 to -43.2)	-48 (-53.6 to -40.9)	0.867
5	SVA	47.7 (20.6-83.2)	52.0 (26.1-83.6)	0.375	42.5 (-2.9-79.1)	33.4 (19.9-77.2)	0.443

LL: Lumbar lordosis; PI: Pelvic incidence; PT: Pelvic tilt; SS: Sacral slope; SVA: Sagittal vertical axis.