<prompt> Framingham hea study is -Case-control studyCoho studyCross-sectional studyNone  <response>: Parks textbook of preventive and social medicine 23rd edition. Framingham study- coho study- the study is identified prior to the appearance of the disease . It proceeds forward from cause to effect. Framingham study- has played a major role in establishing the nature of CHD risk factors and their relative impoance . 