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Table 4 Univariate analysis and multivariate analysis of long-segment fusion risk factors

From: Older fusion-surgery age in congenital scoliosis patients is a risk factor for extended length of stay, more estimated blood loss, longer fused segments and higher medical costs: a retrospective study

Parameters Fused segments > 8 Fused segments ≤ 8 p
Univariate analysis
 Sex (male/female) 225/362 339/281 < 0.001
 Age at fusion 16.61 ± 7.80 8.98 ± 6.69 < 0.001
 CS type (FF/FS/MD) 29.1 %/30.0 %/40.9 % 69.8 %/7.6 %/22.6 % < 0.001
 Cervical deformity 7.3 % 3.9 % 0.009
 Thoracic deformity 93.4 % 61.6 % < 0.001
 Lumbar deformity 20.3 % 49.0 % < 0.001
 Intraspinal defects 45.3 % 12.7 % < 0.001
 Musculoskeletal defects 20.8 % 10.5 % < 0.001
 Cardiac defects 15.0 % 12.0 % 0.194
 Gastrointestinal defects 2.4 % 4.8 % 0.023
 Urogenital defects 5.8 % 5.8 % 0.992
Parameters p Odds ratio 95 % CI
Multivariate analysis
 Age at fusion < 0.001 1.213 1.176–1.251
 Thoracic deformity < 0.001 11.297 6.846–18.644
 Intraspinal defects < 0.001 3.416 2.383–4.897
 CS type < 0.001 - -
  FF - 1 (Reference)  
  FS < 0.001 3.638 2.331–5.667
  MD 0.001 1.873 1.315–2.669
 Cervical deformity 0.026 2.071 1.093–3.925
 Musculoskeletal defects 0.104 1.431 0.929–2.203