Table 2.

Clinical outcome of the patients.

	Clinical outcome	Preoperation	Six months after surgery	Twelve months after surgery	p value
TLIF	VAS	7.35 ± 1.21	4.68 ± 1.21	2.38 ± 1.91	<0.001
	ODI (%)	44.38 ± 6.94	24.85 ± 3.86	14.82 ± 2.61	<0.001
	JOA	9.40 ± 3.18	19.40 ± 3.21	24.45 ± 1.87	<0.001
OLIF	VAS	7.55 ± 1.31	3.45 ± 1.54	1.76 ± 1.05	<0.001
	ODI (%)	46.95 ± 7.85	19.21 ± 4.20	13.55 ± 2.58	<0.001
	JOA	8.32 ± 2.42	22.21 ± 2.96	25.61 ± 2.02	<0.001