Question

Epidemiologically speaking which of the following statements is TRUE? The Framingham Heart Study was an experimental study on the population of a small Massachusetts town designed to test different ways to prevent cardiovascular disease. The smaller the biological difference between the two groups in an epidemiological study the fewer subjects we need to recruit to obtain valid results. The Nurses' Health Study was a large randomized controlled trial begun in the 1960s to test the safety and efficacy of hormone replacement therapy (HRT) for post-menopausal women. Half of the women were randomized to HRT; the other half received placebos. One advantage of a prospective cohort study in contrast to a retrospective one is that one can collect all the data more quickly. Randomized controlled trials are the least likely to suffer from the bias of confounding.

Answer 1

Option. A is correct as Farmington heart study was an experimental study on population of Farmington prior to this nobody know about epidemiology related to cardiovascular diseases. The study took place in 1948 which release major findings like smoking and cholesterol are reasons of hypertension and heart attack.

Nurse health study took place in 1976 therefore this is incorrect