Original Cohort

Research Exam Center staff member helping a participant get ready for a test.

The Original Cohort of the Framingham Heart Study consisted of 5,209 respondents of a random sample of 2/3 of the adult population of Framingham, Massachusetts, 30 to 62 years of age by household, in 1948. Exam 32 for the Original Cohort ended in April of 2014. Exam 30 for the Original Cohort began in May of 2008 and ended in February of 2010.

AGE-SEX DISTRIBUTION AT ENTRY (1948)
Age 29-39 40-49 50-62 Totals
Men 835 779 722 2,336
Women 1,042 962 869 2,873
Totals 1,877 1,741 1,591 5,209