Question

1. Choose the study design that best matches each measure of disease frequency or association listed below. The study design may be used more than once or none at all. (10 points)

Measure of Frequency/Association	Study Design
____ Correlation Coefficient	Case-Control
____ Incidence Rate & Incidence Density (without intervention)	Cross-sectional
____ Relative Risk in treatment vs control group	Ecological
____ Odds Ratio of Exposure	Cohort
____ Prevalence of Disease (snapshot)	Randomized Clinical Trial
____ Relative difference between treatments
____ Prevalence Rate Ratio
____ Rate Ratio & Risk Ratio (without intervention)
____ Odds Ratio of Disease
____ Prevalence Odds Ratio

Answer 1

1.  Correlation Coefficient can be measured in the cohort study for the long term naturally and it can be measured experimentally by Randomized Clinical Trial.

2.  Incidence Rate & Incidence Density (without intervention) is measured by the ecological study.

3. Relative Risk in the treatment vs control group is measure by Randomized Clinical Trial. it is an experimental study where the examiner chose a placebo group and a treatment group.

4. Odds Ratio of Exposure is measure by Case-control study. The odds ratio is measured after disease/result has happened.

5. The prevalence of Disease (snapshot) is measured by a cross-sectional study.

6.  The relative difference between treatments is measured by Randomized Clinical Trial. In this, the examiner divided participants into two ideal groups and give two different types of treatment to identify relation.

7. Prevalence Rate Ratio is measured by cohort study.

8. Rate Ratio & Risk Ratio (without intervention) is measured by Ecological study.

9. Odds Ratio of Disease is measured by case-control study.

10. Prevalence Odds Ratio is measured by cross-sectional study.