Table S1. Frequency distribution of selected characteristics in neuroblastoma cases and cancer-free controls.
| Variables | Combined subjects (9 centers) [n (%)] | ||||
| Cases (N=968) | Controls (N=1,814) | Pa | |||
| INSS, International Neuroblastoma Staging System; NA, not available; a, two-sided χ2 test for distributions between neuroblastoma cases and cancer-free controls. | |||||
| Age (range) (month) | 0−176 | 0−156 | 0.536 | ||
|
32.85±28.22 | 31.67±26.40 | |||
| ≤18 | 380 (39.26) | 734 (40.46) | |||
| >18 | 588 (60.74) | 1,080 (59.54) | |||
| Gender | 0.231 | ||||
| Female | 437 (45.14) | 776 (42.78) | |||
| Male | 531 (54.86) | 1,038 (57.22) | |||
| INSS stages | |||||
| I | 344 (35.54) | − | |||
| II | 164 (16.94) | − | |||
| III | 169 (17.46) | − | |||
| IV | 253 (26.14) | − | |||
| 4s | 20 (2.07) | − | |||
| NA | 18 (1.86) | − | |||
| Sites of origin | |||||
| Adrenal gland | 260 (26.86) | − | |||
| Retroperitoneal region | 344 (35.54) | − | |||
| Mediastinum | 234 (24.17) | − | |||
| Other region | 118 (12.19) | − | |||
| NA | 12 (1.24) | − | |||