Table 3.

Measurement of sagittal balance parameters for L5–S1 in degrees

	Average	Minimum value	Maximum value	Standard deviation	P value
Global lordosis preoperative	53.6	33	72	12.1	0.61
Global lordosis postoperative	54.7	39	65	8.9
L4–L5 lordosis preoperative	11.5	6	22	4.7	0.05
L4–L5 lordosis postoperative	9.6	1	18	5.1
L5–S1 lordosis preoperative	10.3	0	20	5.7	0.03
L5–S1 lordosis postoperative	15.2	6	22	6.4
ST preoperative	37.6	26	46	6	0.63
ST postoperative	38.2	26	47	5.9
PT preoperative	15.1	5	28	6.7	0.57
PT postoperative	14.5	4	28	7.2
Kyphosis preoperative	40.3	19	62	12.7	0.24
Kyphosis postoperative	41.7	22	55	10.2