Table 1.

Distribution of neuroblastoma cases according to site of tumor by age at diagnosis, gender, year of diagnosis, and survival.

Characteristic	All cases (n=245)		Adrenal (n=62)		Peripheral nerves (n=118)		Brain (n=33)		Other sites (n=32)
	No.	%	No.	%	No.	%	No.	%	No.	%
Age at diagnosis
< 1 month	31	13%	15	24%	13	11%	0	0	3	9%
1 month - 1 year	75	31%	17	27%	44	37%	6	18%	8	25%
>1 year	139	57%	30	48%	61	57%	27	82%	21	66%
Mean (months)	32.9 ± 48.5		18.0 ± 21.9		23.4 ± 31.0		92.4 ± 82		36.0 ± 49.5
Gender
Male	131	53%	37	60%	61	52%	17	52%	16	50%
Female	114	47%	25	40%	57	48%	16	48%	16	50%
Birth year
1973-1979	85	35%	17	27%	48	41%	14	42%	6	19%
1980-1989	92	38%	22	35%	43	36%	15	45%	12	38%
1990-1995	68	28%	23	37%	27	23%	4	12%	14	44%
Year of diagnosis
1973-1979	54	22%	14	23%	33	28%	4	12%	3	9%
1980-1989	89	36%	21	34%	46	39%	12	36%	10	31%
1990-1995	102	42%	27	44%	39	33%	17	52%	19	59%
Survival after diagnosis
<3 years	43	18%	18	29%	20	17%	1	3%	4	13%
3+ years	202	82%	44	71%	98	83%	32	97%	28	88%
Prognosis 1
Favorable	82	33%	23	37%	45	38%	5	15%	9	28%
Intermediate	144	59%	30	48%	65	55%	28	85%	21	66%
Unfavorable	19	8%	9	15%	8	7%	0	0	2	6%

¹Prognosis variable was created based on age at diagnosis and survival, as described in Methods section.