Social & Preventive Medicine Epidemiology 20e20351

Which of the following statement is true -

Case control study is not suitable for rare diseases

Cohort study involves large number of subjects

Case-control study is relatively expensive

Cohort study yields relatively quick results

High-Yield Explanation

Ans. is 'b' i.e., Cohort study involves large number of subjects* Prevalence of blindness in India: 700 per 1 lakh population (0.7%) if cut of criteria is < 3/60 (WHO criteria); or 1100 per lakh population (1.1%) if cut of criteria is < 6/60 (NPCB criteria).

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