Table 4

Data analysis of ODI scores and pairwise comparisons.

Descriptive Statistics
ODI	Mean	SD	N
ODI preoperative	66.26	10.554	23
ODI early operative	20.30	12.197	23
ODI 2-y postoperative	6.87	12.282	23

Pairwise Comparisons
Measure: ODI
(I) Time	(J) Time	Mean Difference (IJ)	Std. Error	P Value^{^b}	95% CI for Difference^{^b}
(I) Time	(J) Time	Mean Difference (IJ)	Std. Error	P Value^{^b}	Lower Bound	Upper Bound
1	2	45.957^{^a}	2.075	<0.001	40.579	51.334
	3	59.391^{^a}	2.823	<0.001	52.077	66.705
2	1	−45.957^{^a}	2.075	<0.001	−51.334	−40.579
	3	13.435^{^a}	1.037	<0.001	10.749	16.121
3	1	−59.391^{^a}	2.823	<0.001	−66.705	−52.077
	2	−13.435^{^a}	1.037	<0.001	−16.121	−10.749

Abbreviation: ODI, Oswestry Disability Index.
Note: Based on estimated marginal means.
↵a The mean difference is significant at the.
↵b Adjustment for multiple comparisons: Bonferroni.