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Table 1 Basic information

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

Demographic information

 Sample size

1,207

 Sex (male/female)

564/643

 Age at fusion (year)

12.69 ± 8.19

  Age at fusion (male)

11.51 ± 7.82

  Age at fusion (female)

13.72 ± 8.38 (p < 0.001)

Deformity information

 CS type (FF/FS/MD)

604/223/380 (50.04 %/18.48 %/31.48 %)

 Cervical involved

5.55 % (n = 67)

 Thoracic involved

77.05 % (n = 930)

 Lumbar involved

35.05 % (n = 423)

Comorbidity information

 Intraspinal

28.58 % (n = 345)

 Musculoskeletal

15.49 % (n = 187)

 Cardiac

13.67 % (n = 165)

 Gastrointestinal

3.65 % (n = 44)

 Urogenital

5.80 % (n = 70)

Outcome information

 Length of stay > 14 days

23.86 % (n = 288)

 Estimated blood loss > 800 ml

20.21 % (n = 244)

 Fusion segments > 8 levels

48.63 % (n = 587)

 Medical costs > 20,000 USD

22.04 % (n = 266)