Question: in what ways did the framingham heart study gather its data

title: Framingham Heart Study
text: So called `` high normal blood pressure '' increases risk of cardiovascular disease ( high normal blood pressure is called prehypertension in medicine ; it is defined as a systolic pressure of 120 -- 139 mm Hg and / or a diastolic pressure of 80 -- 89 mm Hg ) . Lifetime risk of developing elevated blood pressure is 90 % . Obesity is a risk factor for heart failure . Serum aldosterone levels predict risk of elevated blood pressure . Lifetime risk for obesity is approximately 50 % . The `` SHARe '' project is announced , a genome wide association study within the Framingham Heart Study . Social contacts of individuals are relevant to whether a person is obese , and whether cigarette smokers decide to quit smoking . Four risk factors for a precursor of heart failure are discovered . 30 - year risk for serious cardiac events can be calculated . American Heart Association considers certain genomic findings of the Framingham Heart Study one of the top research achievements in cardiology . Some genes increase risk of atrial fibrillation . Risk of poor memory is increased in middle aged men and women if the parents had suffered from dementia .