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Table 4 Association of rod fracture risk with postoperative characteristics

From: Risk factors for rod fracture after posterior correction of adult spinal deformity with osteotomy: a retrospective case-series

Confounders Subgroups Rod(s) fracture Odds ratio (95 % Cl: min; max) P(χ2)
   Yes No   
Postoperative sagittal imbalance ≥50 mm 3 22 1.5 (0.3; 8.1) >0.5
<50 mm 3 33   
Postoperative coronal imbalance ≥30 mm 2 16 1.2 (0.2; 7.1) >0.5
<30 mm 4 38   
Postoperative lumbar lordosis (LL) <49° 4 21 2.5 (0.5; 12.4) 0.3
≥49° 3 40   
Postoperative thoracic kyphosis ≥40° 3 33 0.5 (0.1; 2.6) 0.5
<40° 4 23   
Postoperative pelvic incidence (PI) <42° 2 11 1.8 (0.3; 11.0) >0.5
≥42° 4 39   
Postoperative PI-LL >10° 1 16 0.4 (0.04; 3.3) 0.4
≤10° 5 28   
Postoperative pelvic tilt ≤20 4 27 1.9 (0.3; 11.4) 0.5
>20 2 26   
Postoperative coronal Cobb angle <25° 7 54 N/A 0.4
≥25° 0 14   
Pseudarthrosis at ≥1 year follow-up Yes 4 3 28.9 (4.4; 191.7) <0.001
No 3 65