Table I. Characteristics of the Patient and Control Populations.

	Patients (n=126)	Controls (n=114)	P value
Age			0.0001
<18 months	58	0
>18 months	68	114
Gender			0.52
Female	61 (48%)	50 (44%)
Male	65 (52%)	64 (56%)
Ethnicity			0.3
Hispanic	30 (24%)	31 (27%)
NH White	71 (56%)	57 (50%)
NH Black	12 (10%)	16 (14%)
Other	12 (10%)	10 (9%)
INSS Tumor Stage
Stage 1	10 (8%)
Stage 2	17 (13%)
Stage 3	30 (24%)
Stage 4	59 (47%)
Stage 4S	8 (6%)
Unknown	2 (2%)
Risk Group
Low	22 (18%)
Intermediate	30 (24%)
High	61 (48%)
Unknown	13 (10%)
MYCN status
Amplified	35 (28%)
Non-amplified	67 (53%)
Unknown	24 (19%)