Module 1
Categorical dataQuestions -when outcomecreating cana bestudy:
- Outcome of
possibleinterest? - Groups?
- Population?
- Type of Study?
ComparitiveComparative studies are intended to show differences of an outcome between two or more groups.
Cross Sectional - Collected at one point in time
LongitudubalLongitudinal - multiple data sets collected at different points in time
Retrospective - Collecting "group data" on selected outcomes
Prospective - Collecting "outcome" on selected groups
Cohort studies gather data on groups of interest
| Study Design |
Pros |
Cons |
| Randomized trials |
Strength of evidence |
May be unethical |
| Cohort studies |
Relative risk |
Bias confounding |
| Case-Control studies |
Easy and inexpensive |
Bias confounding |
| Cross-sectional |
Simplest |
Weakest evidence |