Table 3 Univariate analysis and multivariate analysis of EBL risk factors

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