<qa>  What is the case-control, cross-sectional survey?The study is a case-control, cross-sectional survey that includes both behavior alcohol, smoking, substance use, physical activity and physiological lipids, blood pressure, adiposity measures. Self-identified lesbian women will be age, education, and racially matched to heterosexual women. The study will test the hypotheses that the prevalence and pattern of coronary heart disease CHD risk factors are different between lesbians and heterosexual women. The study will also determine the absolute and relative risk estimates for CHD based on the Framingham multiple-risk-factor assessment equations, and test the hypothesis that lesbians are at increased risk of CHD compared to heterosexual women. 