Table 3.

Radiological outcomes

	OLIF51	TLIF51	P
Preoperative MDH (mm)	9.9±2.5	9.9±2.1	NS
Postoperative MDH (mm)	14.6±2.4*	12.5±1.8*	<0.001
Preoperative FH (mm)	14.1±2.4	13.8±2.9	NS
Postoperative FH (mm)	17.4±2.4*	14.8±2.8*	<0.001
Preoperative DA (°)	13.0±6.4	13.7±5.2	NS
Postoperative DA (°)	22.6±4.7*	12.3±4.5	<0.001
Fusion rate (%)	81.1	87.8	<0.05
Subsidence rate (%)	16.2	25.3	<0.05

Values are presented as mean±standard deviation or number.

^*p<0.001 comparing to preoperative value.

OLIF51 : oblique lateral interbody fusion at L5–S1 level, TLIF51 : transforaminal lumbar interbody fusion at L5–S1 level, P : comparison between OLIF51 and TLIF51 groups, MDH : mean disc height, FH : foraminal height, DA : disc angle