Question

1. (True or False) The relative risk (RR) is useful in planning health program while the attributable risk (AR) is useful in etiologic study of the disease.

2, (True or False) To avoid the selection bias in a case-control study, cases and controls should be selected independently of exposure status.

3. In a case-control study, which of the following is NOT an advantage of using hospital controls?

a)They are easily identified.

b)Their recall is likely better

c)They tend to be more willing to participate

d)They typically do not represent the general population

4. A cohort study differs from a case-control study in that:

a)Subjects are enrolled or categorized on the basis of their exposure status in a cohort study but not in a case-control study

b)Subjects are asked about their exposure status in a cohort study but not in a case-control study

c)Cohort studies require many years to conduct, but case-control studies do not

d)Cohort studies are conducted to investigate chronic diseases, case-control studies are used for infectious diseases

Please provide the answer (A, B, C, D) and brief explanation if possible

Answer 1

Ans-1

True ,as because attrituable risk tell about the association of disease and that risk factor

But relative risk not tell about the association

Ans-2

False, exposure is the main factor to discribe between case and control and outcome of association is depend on exposure and non exposure

Ans-3

D ,they typically don't repreasent the general population

Ans-4

C ,case control study require more time as it is progress in forwrd direction so time is required but case control progress in backward direction so no much time is required