Table 1.

Characteristics of Participants and Non-Participants

		Participants		Non-Participants		P-value
		(N = 1361)		(N = 907)
		N	%	N	%
Sex
Female		686	50.40	406	44.76	<0.001
Male		675	49.60	501	55.24
Race
White		1196	87.88	790	87.10	0.58
Other		165	12.12	117	12.90
Age At Diagnosis
0 to 4		584	42.91	368	40.57	0.78
5 to 9		341	25.06	238	26.24
10 to 14		272	19.99	180	19.85
15 to 20		160	11.76	118	13.01
Over 20		4	0.29	3	0.33
Time Since Diagnosis
10 to 19		180	13.23	72	7.94	<0.001
20 to 29		577	42.40	373	41.12
30 to 39		453	33.28	349	38.48
>= 40		151	11.09	113	12.46
Testicular/Ovarian Radiation
Yes		203	14.92	134	14.77	0.93
No		1158	85.08	773	85.23
Cranial Radiation
Yes		613	45.04	307	33.85	<0.001
No		748	54.96	600	66.15
Abdomen/Pelvic Radiation
Yes		275	20.21	180	19.85	0.83
No		1086	79.79	727	80.15
Steroids
Yes		901	66.20	473	52.15	<0.001
No		460	33.80	434	47.85
Relapse
Yes		184	13.52	117	12.90	0.67
No		1177	86.48	790	87.10
Bone Marrow Transplant
Yes		25	1.84	13	1.43	0.46
No		1336	98.16	894	98.57
Diagnosis
Leukemia		790	58.05	427	47.08	<0.001
CNS Tumor		132	9.70	85	9.37
Hodgkin's Lymphoma		121	8.89	91	10.03
Non-Hodgkin’s Lymphoma		64	4.70	43	4.74
Wilm's Tumor		42	3.09	46	5.07
Neuroblastoma		46	3.38	48	5.29
Soft tissue sarcoma		42	3.09	41	4.52
Bone Cancer		33	2.42	63	6.95
Retinoblastoma		60	4.41	38	4.19
Other		31	2.28	25	2.76

CNS, Central nervous system