1
Q
List our four studies from least to most valid.
A
- Cross-sectional
- Case-control
- Cohort
- Clinical Trials
2
Q
Only study that can tell you prevalence of disease?
A
cross-sectional
3
Q
Potential Bias in Cross-Sectional Studies?
A
volunteer, recall
4
Q
Benefits of Cross-Sectional Studies
A
inexpensive, fast, useful for common diseases
5
Q
Potential Bias in Case-Control Studies?
A
recall bias
6
Q
Two Ways to Use Multiple Controls in Case Control Studies
A
- Multiple controls of same type to increase statistical power
- Controls of different types to help control recall bias
7
Q
Pros of Case Control Studies
A
less expensive, lots of exposures, great first step, faster, useful for rare diseases
8
Q
Potential Bias in Cohort Studies?
A
information, loss to follow up, analytic
9
Q
placebo
A
can only be used if no known therapy exists
