Demographics and comorbidities of congenital scoliosis patients who underwent posterior fusion (N = 816).
| Variables | n (%) |
| Age, y mean ± SD | 11.32 ± 4.02 |
| Age, y | |
| 0–4 | 83 (10.2) |
| 5–9 | 131 (16.1) |
| 10–14 | 423 (51.8) |
| 15–19 | 179 (21.9) |
| Sex | |
| Women | 468 (57.4) |
| Men | 348 (42.7) |
| Body mass index group | |
| Underweight (<18.5 kg/m2) | 363 (44.5) |
| Nonobese (18.5–29.9 kg/m2) | 392 (48.0) |
| Obese I (30.0–34.9 kg/m2) | 42 (5.2) |
| Obese II (35.0–39.9 kg/m2) | 14 (1.7) |
| Obese III (≥40 kg/m2) | 5 (0.6) |
| Nutritional support | 49 (6) |
| Esophageal/gastric/intestinal disease | 98 (12.0) |
| Ionotropic support during surgery | 8 (1.0) |
| Seizure disorder | 35 (4.3) |
| Tracheostomy | 13 (1.6) |
| Chronic steroid use | 4 (0.5) |
| Developmental delay | 189 (23.2) |
| Previous cardiac surgery | 98 (12.0) |
| Chronic lung disease | 58 (7.1) |
| Structural central nervous system abnormality | 183 (22.4) |
| Asthma | 89 (10.9) |
| Oxygen support | 16 (2.0) |
| Hematological disease | 20 (2.5) |
| Structural pulmonary/airway abnormality | 91 (11.2) |
| Blood transfusions within 48 h prior to surgery | 4 (0.5) |
| American Society of Anesthesiologists Score | |
| 1–2 | 458 (56.1) |
| >2 | 358 (43.9) |
| Fusion to pelvis | 61 (7.5) |
| Osteotomy | 254 (31.1) |
| Levels fused | |
| <7 | 302 (37.0) |
| 7–12 | 304 (37.3) |
| >12 | 210 (25.7) |
| Length of stay, d | 4.64 ± 3.71 |
| Readmission | 43 (5.3) |
Note: Data presented as n (%) unless otherwise indicated.