Question

Discuss and distinguish between a 'case-control' and a 'cohort' study.

Answer 1

first you see the uploaded document which starts with epidemological study design and brief introduction of case control and cohort study

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than few more points is mentioned below....

case control study has 3 distinct features...

1.it has 2 different population one is case another is control...

2.before inition of study both i.e. exposure and outcome already occured.

3. study proceed backward i.e. from effect to cause...

few more advantage of case control study....

a. cheaper...b quicker ....c.easier to conduct....d. multiple risk factor can be studied....f.good for rare diseases

few dis advantages of case control study....

a.more bias....b.only access one outcome or disease....c.risk can not be established....d.not measure incidence or prevlance...

IN COHORT STUDY....

ADVANTAGES..

A. can established risk ...B..good for rare exposure ....C.can access multiple outcome...

DISADVANTAGES...

A. expensive....B. difficult to conduct...C. not good for rare diseases...D.not good for diseases with very long latent period...

please read the uploaded pics for more clearification