. 2014 Feb 12;472(6):1831–1838. doi: 10.1007/s11999-014-3499-8

Table 1.

Demographics in patients with MIS versus open sacroiliac joint fusion

Variable	Open group (n = 22)	MIS group (n = 22)	p value
Age (years)*	51.0 ± 9.4	47.9 ± 13.1	0.361^†
BMI*	29.9 ± 4.0	30.5 ± 6.1	0.711^†
Preoperative ODI (points)*	61.8 ± 10.8	61.5 ± 12.5	0.898^†
Sex (male:female) (number of patients)	9:13	5:17	0.201^‡
Spine surgery history (number of patients)	11 (50%)	14 (64%)	0.367^‡

* Values are expressed as mean ± SD; ^†Student’s t-test; ^‡Mann-Whitney U test; MIS = minimally invasive surgery; ODI = Oswestry Disability Index.