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Patient demographic characteristics.
| Characters | Median (IQR)/Mean | No. (%) |
|---|---|---|
| Age | 4.6 ± 1.7 | |
| Male | 87 (63%) | |
| Symmetry | 120 (86.3%) | |
| BMI | 14.9 ± 1.4 | |
| Comorbidity | 13 (9.4%) | |
| Symptoms | 0 | |
| Family history | 36 (25.9%) | |
| Thoracic surgery history | 2 (1.4%) | |
| Initial pressure | 15 (12, 20) | |
| Complications | 40 (28.8%) |
