Clin. Epi. Study Designs - Observational Flashcards
1
Q
describe epidemiologic study designs and increasing strength of evidence
A
2
Q
describe case control studies
A
3
Q
describe cross-sectional studies
A
- measure the prevalence of disease
-
assess both exposure and disease at the same time (simultaneously)
- no time lapse
4
Q
describe ecological studies
A
- cross-sectional ecological studies relate the frequency with which some characteristic (e.g. smoking) and some outcome of interest (e.g. lung cancer) occur in the same geographic area (e.g. a city, state, country)
- in contrast to all other epidemiologic studies, the unit of analysis in ecological studies is populations not individuals