Table S1.

Frequency distribution of selected variables in Wilms’ tumor patients and controls

Variables	Cases (n=145)		Controls (n=531)		P-valuea
	N	%	N	%
Age range, months (mean ± SD)	1–132 (26.17±21.48)		0.07–156 (29.73±24.86)		0.725
≤18	66	45.52	66	45.52
>18	79	54.48	79	54.48
Gender					0.956
Females	64	44.14	233	43.88
Males	81	55.86	298	56.12
Clinical stage
I	4	2.76
II	49	33.79
III	50	34.48
IV	33	22.76
NA	9	6.21

Note:

^aTwo-sided χ² test for distributions between Wilms’ tumor patients and controls.

Abbreviations: NA, not available; SD, standard deviation.