Table 3.
Comparison of Complications Between IS and S2AI.
| IS (n = 17) | S2AI (n = 46) | ||||
|---|---|---|---|---|---|
| n | % | n | % | P a | |
| Reoperation | 10 | 58.8 | 10 | 21.7 | .01 |
| PJF requiring reoperation | 5 | 29.4 | 6 | 13.0 | .16 |
| PJK | 6 | 35.3 | 15 | 32.6 | >.99 |
| L5-S1 pseudarthrosis | 2 | 11.8 | 1 | 4.3 | .18 |
| Distal device failurea | 3 | 17.6 | 3 | 6.5 | .33 |
| SSI | 4 | 23.5 | 1 | 2.2 | .02 |
| Wound dehiscence | 3 | 17.6 | 1 | 2.2 | .06 |
| Incidental durotomy | 1 | 5.9 | 5 | 10.9 | >.99 |
| DVT | 1 | 5.9 | 3 | 6.5 | >.99 |
Abbreviations: IS, iliac screw; S2AI, S2-alar-iliac screw; PJF, proximal junctional failure; PJK, proximal junctional kyphosis; SSI, surgical site infection; DVT, deep vein thrombosis.
a P values in boldface indicate statistical significance.
bFracture or pull-out of instrumentation in the L4-pelvis region.