Table 4

Radiographic data of LLIF and PLIF preoperatively and at the 2-year follow-up.

Parameters	LLIF (n = 30)		P	PLIF (n = 50)		P	2-y Comparison
Parameters	Preoperative	2 y	P	Preoperative	2 y	P	2-y Comparison
Lumbar lordosis (°)	38.33 ± 12.92	42.97 ± 13.42	0.015^{^a}	33.62 ± 12.35	37.08 ± 12.38	<0.001^{^a}	0.049^{^a}
Foraminal height, mm	16.10 ± 2.92	19.30 ± 3.32	<0.001^{^a}	11.11 ± 3.27	13.30 ± 2.56	<0.001^{^a}	<0.001^{^a}
Disc height, mm	6.07 ± 2.968	11.33 ± 2.93	<0.001^{^a}	6.72 ± 2.35	9.53 ± 1.83	<0.001^{^a}	0.001^{^a}

Abbreviations: LLIF, lateral lumbar interbody fusion; PLIF, posterior lumbar interbody fusion.
↵a Significant at a P value of less than 0.05. Statistical analysis using Student’s t test for both unpaired and paired t tests.