Table S1.

Characteristics of neuroblastoma cases and cancer-free controls

Variables	Cases (n=256)		Controls (n=531)		P-valuea
	n	%	n	%
Age range, months	0–156		0.07–156		0.239
≤18	101	39.45	233	43.88
>18	155	60.55	298	56.12
Mean ± SD	30.87±	26.45	29.73±	24.86
Gender
Female	103	40.23	233	43.88	0.333
Male	153	59.77	298	56.12
Clinical stages
I	54	21.09
II	65	25.39
III	44	17.19
IV	77	30.08
4s	9	3.52
NA	7	2.73
Sites of origin
Adrenal gland	46	17.97
Retroperitoneal region	87	33.98
Mediastinum	90	35.16
Other regions	25	9.77
NA	8	3.13

Note:

^aTwo-sided χ² test for distributions between neuroblastoma cases and controls.

Abbreviation: NA, not available.