Which one of the following is a coho study: (A) Noh Karelia project, (B) Standard three community study, (C) MRFIT study, (D) Framingham hea study
Answer is D. A coho study is a paicular form of a longitudinal study that samples a coho (a group of people who share a defining characteristic, typically those who experienced a common event in a selected period, such as bih or graduation), performing a cross-section at intervals through time. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 83