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Table 5 Association of CSRF risk with variables showing increased risk with P ≤ 0.2

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

Confounders Subgroups CSRF fracture Odds ratio (95 % Cl: min; max) P(χ2)
   Yes No   
Screw density Incompletea 3 28 4.6 (0.5; 46.5) 0.2
Complete 1 43   
Sagittal rod contour >60° 3 21 7.1 (0.7; 72.7) 0.1
≤60° 1 50   
Crosslinks ≥2 2 14 4.1 (0.5; 31.5) 0.2
0–1 2 57   
Domino and/or parallel connectorsa Yes 2 10 6.1 (0.8; 48.4) 0.1
No 2 61   
Number of crossing junctions 2 3 30 4.1 (0.4; 41.4) 0.2
0–1 1 41   
Fusion to sacrum Yes 4 41 N/A 0.2
No 0 30   
Fusion to pelvis Yes 4 20 N/A 0.05
No 0 51   
Pseudarthorsis at Yes 3 4 50.3 (4.2; 598.8) <0.01
≥1 year follow-up No 1 67   
  1. aMissing one or more pedicle screws at available locations along construct