Which of the following statement is true

Which of the following statement is true –

A. Case control study is not suitable for rare diseases

B. Cohort study involves large number of subjects

C. Case-control study is relatively expensive

D. Cohort study yields relatively quick results

Correct Answer: Cohort study involves large number of subjects

Description: 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).

Category: Social & Preventive Medicine

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