Table 4.

 Estimated differences in Oswestry disability index score between epidural injection groups and sham group at follow-up

	Difference (95% confidence intervals) at follow-up
	6 weeks	12 weeks	52 weeks
Crude analysis*
Epidural saline injection	−0.5 (−6.3 to 5.4)	1.4 (−4.5 to 7.2)	−1.9 (−8.0 to 4.3)
Epidural steroid injection	−2.9 (−8.7 to 3.0)	4.0 (−1.9 to 9.9)	1.9 (−4.2 to 8.0)
Adjusted analysis†
Epidural saline injection	−0.6 (−6.6 to 5.4)	1.5 (−4.5 to 7.5)	−2.6 (−8.9 to 3.6)
Epidural steroid injection	−3.2 (−9.1 to 2.7)	3.7 (−2.3 to 9.7)	1.7 (−4.5 to 7.8)

Data based on mixed model analysis with sham group as reference.

*Analysis adjusted for baseline values.

†Analysis adjusted for duration of leg pain, back pain, and sick leave.