Beginning in 1995, the longitudinal study examined the following: 1) the relationship of body mass index (BMI), blood pressure, total cholesterol, and smoking behaviors measured in childhood to IMT measured in early adulthood; 2) the relationship of risk factors (BMI, blood pressure, total cholesterol, LDL-C, HDL-C, Apo A1, Apo B, Lp(a), Apo E genotypes, glucose insulin and smoking) to IMT in young adults; 3) the relationship of risk factor 'load' from childhood to adult life to IMT; 4) the relationship of IMT in young adults to familial mortality in first- and second-degree relatives due to vascular disease; and 5) the degree of familial aggregation of IMT in young adults and their parents.