Table 4.

Pre- and postoperative sagittal parameters in Group 1 (lumbar disc herniation) and Group 2 (lumbar spinal stenosis) patients

	Group 1			Group 2
	Preoperative	Postoperative	P	Preoperative	Postoperative	P
TK	28.72±7.04	29.19±8.008	0.76	26.88±10.31	31.46±9.31	<0.001
TPA	11.04±13.84	11.53±12.4	0.72	13.98±8.19	13.25±7.69	0.349
LL	(−) 46.03±14.91	(−) 46.86±16.2	0.642	(−) 47.55±12.88	(−) 50.57±11.52	0.058
SS	31.71±11.04	31.14±12.82	0.599	33.55±10.79	33.89±9.48	0.372
PV	15.32±13.29	16.87±12.6	0.225	18.78±7.9	18.09±7.38	0.371
PI	47.02±10.93	48.01±10.75	0.464	52.32±14.46	51.92±12.79	0.689
SVA	10.06±44.22	4.84±34.6	0.458	10.34±35.55	9.75±33.98	0.941

SVA - Sagittal vertical axis; TPA - T1-pelvic angle; LL - Lumbar lordosis; TK - Thoracic kyphosis; SS - Sacral slope; PV - Pelvic tilt; PI - Pelvic incidence