Our sample consists of two unique groups of men recruited in the 1930's and 1940's:
1. Harvard Cohort - Grant Study
The participants for this study were chosen when they were around 19 years old. It is a group of 268 Caucasian men from the Harvard classes of 1939-1944.
2. Boston Cohort - Glueck Study
456 Caucasian men from the neighborhoods of Boston were selected at ages between 11-16 by Harvard Law School professors Sheldon and Eleanor Glueck.