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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)