Two thousand five hundred and twenty-four individuals were enrolled in the UCSF Family Alcoholism Study of which 1647 were included in the reported linkage analysis. These participants had a mean age of 49.9 ± 12.8 years, a mean educational level of 14.6 ± 2.9 years, and a mean annual income of $59,663 ± $55,542 (median, $45,000). Racial distribution was 93% Caucasian, 3% Hispanic American, 2% African-American, and 1% each Native American and other. No attempt was made to exclude or over sample minorities. Probands were 62% female. Relatives of probands were 37% alcohol dependent.
