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. 2015 Sep 16;8:395–403. doi: 10.2147/MDER.S92070

Table 1.

Demographic characteristics

SIJ
SPORT
INSITE
N=148
SIFI
N=171
DS
N=607
IDH
N=1,244
SPS
N=654
Female, Number (%) 103 (69.6%) 119 (69.6%) 418 (68.9%) 522 (42.0%) 254 (38.8%)
Age (years), mean (SD) 51.3 (11.2) 50.8 (11.3) 66.1 (10.3) 41.7 (11.4) 64.6 (11.7)
Body mass index, mean (SD) 30.4 (6.5) 29.3 (6.6) 29.1 (6.2) 28.0 (5.5) 29.4 (5.6)

Abbreviations: DS, degenerative spondylolisthesis; IDH, intervertebral disc herniation; INSITE, Investigation of Sacroiliac Fusion Treatment; SIFI, Sacroiliac Joint Fusion with iFuse Implant System®; SIJ, sacroiliac joint; SPORT, Spine Patient Outcomes Research Trial; SPS, spinal stenosis.