CEBM – Study Designs

Format: Websites
Language/s: English
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Short Description:

A short article explaining the relative strengths and weaknesses of different types of study design for assessing treatment effects.

Key Concepts addressed:


This short article gives a brief guide to the different study types and a comparison of the advantages and disadvantages. See also Levels of Evidence

These study designs all have similar components (as we’d expect from the PICO):

  • A defined population (P) from which groups of subjects are studied
  • Outcomes (O) that are measured

And for experimental and analytic observational studies:

  • Interventions (I) or exposures (E) that are applied to different groups of subjects

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