Sacral Anatomical Orientation in the Lebanese Population

Table 2

Student t-test and Levene’s test for SAO and PI between control and spondylolisthesis groups.

	Levene’s test for equality of variances
	F	Sig.	T	df	Sig. (2-tailed)	Mean difference	Std. error difference
SAO
Equal variances assumed	0.516	0.473	−4.147	198	0.000	−8.446	2.03660
Equal variances not assumed			−3.746	17.159	0.002	−8.4465	2.25473
PI
Equal variances assumed	0.125	0.724	1.303	198	0.194	4.202	3.22466
Equal variances not assumed			1.380	18.197	0.184	4.202	3.04485