Which of the following study type is the best to study natural history of a disease?: (A) Coho Study, (B) Case Control Study, (C) Randomized Control Trials, (D) Interventional Studies
Answer is A. Natural history of a disease is best studied by coho studies. But these studies tend to be costly and laborious. Hence crossectional and retrospective studies are often undeaken to study natural history of any disease. Ref: Park, 21st Edition, Page 32.