Table 2.

Comparison of preoperative and postoperative lordosis within groups.

	Operative Level			Regional (L1-S1)
	Pre-oplordosis (mean ± SD)	Post-oplordosis (mean ± SD)	p value	Pre-oplordosis (mean ± SD)	Post-oplordosis (mean ± SD)	p value
LLIF	12.1 ± 7.9°	15.3 ± 8.5°	p<0.01	51.5 ± 11.3°	54.0 ± 10.0°	p<0.01
ALIF	15.8 ± 11.9°	19.6 ± 11.7°	p<0.01	51.6 ± 13.0°	55.8 ± 12.6°	p<0.01
TLIF	13.0 ± 10.3°	14.9 ± 9.7°	p<0.01	47.2 ± 14.2°	49.3 ± 14.4°	p=0.02
PSF	14.8 ± 9.6°	15.5 ± 9.7°	p=0.13	49.5 ± 15.0°	48.9 ± 16.8°	p=0.66