Which of the following is true about coho study?: (A) Disease to risk factor study, (B) Effect to cause study, (C) Not associated with attributable risk, (D) Associated with antecedent causation
Answer is D. A coho study is a paicular form of 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