Question

Select an epidemiologic study, download, review and answer the following question

•1. What was the general aim of the study?

•2. What was the exposure of interest?

•3. What was the primary outcome measure?

•4. What was the original hypothesis of the authors?

•5. What type of study design did they employ?

•6. Why do you think they chose that study type?

•7. What advantages and disadvantages does the study type have?

•8. What potential confounding factors can you identify?

Answer 1

According to the question .here I reviewed a Case control epidemiogical study

1 The general aim for that study was to find out lung cancer in smoker versus non smoker .

2 Exposure of interest was smoking

3 primary outcome measure was smokers are suffering from lung cancer more than non smoker

4 The original hypothesis was smokers are more vulnerable to lung cancer as compared to non smoker

5. They employed case control study a retrospective kind of study

6. It is easy , cases and control both are easily available.

Requires few subject

Outcome is more accurate

Can be conducted in normal set up

Gives the exact data about the effect of Risk factor.

7. Advantage

Less time taking.

Easy to conduct

Requires less subject

Inexpensive

All the possible risk factors can be found

Disadvantage

Bias in selection of cases

Not easy to find the group of individuals for control

Rates of disease cannot be determined

8. Pollution

Living in unhygienic condition