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Table 3 Univariate analysis and multivariate analysis of EBL 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 EBL > 800 ml EBL ≤ 800 ml p
Univariate analysis
 Sex (male/female) 128/116 436/527 0.045
 Age at fusion 18.44 ± 8.56 11.23 ± 7.42 < 0.001
 CS type (FF/FS/MD) 45.9 %/16.8 %/37.3 % 51.1 %/18.9 %/30.0 % 0.091
 Cervical deformity 7.0 % 5.2 % 0.279
 Thoracic deformity 82.0 % 75.8 % 0.041
 Lumbar deformity 36.5 % 34.7 % 0.600
 Intraspinal defects 34.8 % 27.0 % 0.016
 Musculoskeletal defects 17.6 % 15.0 % 0.303
 Cardiac defects 12.7 % 13.9 % 0.623
 Gastrointestinal defects 3.7 % 3.6 % 0.968
 Urogenital defects 6.6 % 5.6 % 0.571
Parameters p Odds ratio 95 % CI
Multivariate analysis
 Age at fusion < 0.001 1.117 1.094–1.141
 Sex (male) < 0.001 1.813 1.319–2.494
 CS type 0.047 - -
  FS - 1 (Reference)  
  MD 0.027 1.662 1.061–2.604
  FF 0.021 1.718 1.087–2.717
 Thoracic deformity 0.146 1.352 0.900-2.032
 Intraspinal defects 0.165 1.274 0.905–1.795