In addition to cigarette smoking, raised blood cholesterol, and diabetes, elevated blood pressure is a well-established risk factor for developing CHD and stroke (1, 2, 3 and 4). Associations appear to be strong, independent of other risk factors, and incremental across the full blood pressure range (3 and 4). However, to date, findings have largely been confined to middle-aged and older populations (5), limiting the understanding of the relationship, if any, with blood pressure measured earlier in life. Like other physiological risk factors, blood pressure measured in early adulthood “tracks” into middle age, such that individuals who initially have higher blood pressure also tend to have higher values in later life (6).