Table 1.

Descriptive Characteristics for Non-Hispanic White Female Patients With Glioma and Controls Included in an Analysis of Genes and Reproductive Factors From 4 US Studies, 1993–2001

Population Characteristic	Controls		Cases
	No.	%	No.	%
Age, years
<45	133	16	133	37
45–64	199	24	106	30
≥65	490	60	118	33
Educational level, years
<12	76	9	32	10
12–15	554	68	222	67
≥16	187	23	78	23
Study
National Cancer Institute Glioma Case-Control Study	210	26	151	45
National Institute for Occupational Safety and Health Upper Midwest Health Study	240	29	129	38
Agricultural Health Study	15	2	6	2
Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial	357	43	51	15