Observational research methods—Cohort studies, cross sectional studies, and case–control studies
Cohort, cross sectional, and case–control studies are collectively referred to as observational studies. Observational studies are often the only practicable method of answering questions of aetiology, the natural history and treatment of rare conditions and instances where a randomised controlled t...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2012-03-01
|
| Series: | African Journal of Emergency Medicine |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211419X11001637 |