Table 3.

Comparison of ODI Between Conventional MIS TLIF and ULIF

	Conventional MIS TLIF	ULIF	Mean Difference (CI 95%)	P value
	N=73	N=72
Oswestry Disability Index
Pre operation	62 (56.5–70.5)	60 (52–63.5)	6 (−2–14)	0.103
Post operation
Directly	54 (37–49)	41 (49–60.5)	11 (−3–17)	0.045
3 months	16 (5.5–14.5)	12 (8–32.5)	−4 (−12–2)	0.232
6 months	12 (4–12.5)	8 (4–19)	−2 (−8–4)	0.483
12 months	8 (1.5–10)	6 (3.5–17.5)	−3 (−10–2)	0.184