Table 5 Univariate analysis and multivariate analysis of medical costs risk factors

Parameters

Medical costs > 20k USD

Medical costs  ≤ 20k USD

p

Univariate analysis

 Sex (male/female)

126/140

438/503

0.812

 Age at fusion

17.67 ± 9.10

11.28 ± 7.33

< 0.001

 CS type (FF/FS/MD)

38.0 %/24.4 %/37.6 %

53.5 %/16.8 %/29.8 %

< 0.001

 Cervical deformity

5.6 %

5.5 %

0.943

 Thoracic deformity

86.1 %

74.5 %

< 0.001

 Lumbar deformity

28.9 %

36.8 %

0.018

 Intraspinal defects

35.0 %

26.8 %

0.009

 Musculoskeletal defects

16.2 %

15.3 %

0.731

 Cardiac defects

15.0 %

13.3 %

0.462

 Gastrointestinal defects

2.3 %

4.0 %

0.171

 Urogenital defects

8.6 %

5.0 %

0.024

Parameters

p

Odds ratio

95 % CI

Multivariate analysis

 Age at fusion

< 0.001

1.091

1.071–1.112

 Thoracic deformity

0.004

1.853

1.222–2.810

 Urogenital defects

0.182

1.476

0.833–2.613

 CS type

0.448

-

-

  FF

-

1 (Reference)

  FS

0.280

1.247

0.835–1.860

  MD

0.274

1.216

0.857–1.725

 Intraspinal defects

0.899

1.021

0.740–1.408