Table I.

Distribution of selected birth & maternal characteristics obtained from birth certificate records for controls, all cancer cases, and specified cancer subtypes, Texas Cancer Registry, 1995 to 2006

	Control subjects (n = 11 200)		Total cases (n = 2800)		ALL (n = 895)		Medulloblastoma (n = 114)		Non-Hodgkin lymphoma(n = 115)
	No.	%	No.	%	No.	%	No.	%	No.	%
Sex
Male	6160	55.00	1540	55.00	493	55.08	78	68.42	73	63.48
Female	5040	45.00	1260	45.00	402	44.92	36	31.58	42	36.52
P value*				1.00		.92		.004		.07
Ethnicity
White	4034	36.02	1070	38.21	322	35.98	44	38.60	50	43.48
Black	1395	12.46	261	9.32	46	5.14	17	14.91	5	4.35
Hispanic	5482	48.95	1414	50.50	510	56.98	51	44.74	55	47.83
Other	289	2.58	55	1.96	17	1.90	2	1.75	5	4.35
P value*				<.001		<.001		.69		.03
Birth weight
Low	794	7.09	180	6.43	39	4.36	9	7.89	6	5.22
Normal	9439	84.28	2326	83.07	746	83.35	88	77.19	95	82.61
High	967	8.63	294	10.50	110	12.29	17	14.91	14	12.17
P value*				.005		<.001		.05		.33
Maternal education
< High school	3647	32.56	875	31.25	293	33.30	33	28.95	42	36.52
High school	3418	30.52	861	30.75	267	29.83	33	28.95	36	31.30
Some college	1913	17.08	515	18.39	159	17.76	22	19.30	15	13.04
Bachelors degree	1171	10.46	304	10.86	96	10.72	16	14.04	11	9.57
Graduate degree	881	7.87	209	7.46	70	7.82	9	7.89	9	7.83
Unknown	170	1.52	36	1.29	10	1.12	1	0.88	2	1.74
P value*				.41		.99		.77		.88
Prior births
0	4365	38.97	1117	38.89	345	38.55	37	32.46	50	43.48
1	3547	31.67	885	31.61	266	29.72	41	35.96	37	32.17
≥2	3152	28.15	762	28.21	271	30.28	35	30.70	28	24.35
Missing	136	1.21	36	1.29	13	1.45	1	0.88	0
P value*				.90		.62		.73		.22
Maternal age at child’s birth (years)
<35	10 092	90.11	2478	88.46	783	87.49	108	94.74	104	90.43
≥35	1108	9.89	322	11.54	112	12.51	6	5.26	11	9.57
P value*				.01		.02		.09		.91

^*P values derived from Pearson χ² function or Student t test where appropriate in comparison to control group.