Framingham hea study (CHD study) is a type of:: (A) Coho study, (B) Case control study, (C) Cross sectional study, (D) Ecological study
Answer is A. Framingham Hea study: Is a classical example of Coho study. Initiated in 1948 by US public health service at Framingham, a town in Massachusetts, USA. Aim: To study the relationship of risk factors (serum cholesterol, blood pressure, weight, smoking) to the subsequent development of Cardiovascular diseases. Sample size of 4469 individuals between age of 30-62 years is taken. Checks incidence of CHD every 2 years.