Study Designs
Click on the + to learn more about each study design!
Both
Experimental Studies
Observational Studies
ALL Study Designs...
Need careful definition of outcome (disease) Need careful definition of risk factor (exposure) may consume.
Key Features of an Observational Study
Case report/case series
Cross-sectional (prevalence) survey
Case-control study
Cohort study Inferences limited to descriptions and associations
With carefully designed analysis, can make stronger inferences (statistical adjustment)
Key Features of Experimental Designs
Designs:
Randomized controlled (clinical) trial (RCT)
Inferences:
Cause and effect
Study Designs
Mariah
Created on February 27, 2026
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Transcript
Study Designs
Click on the + to learn more about each study design!
Both
Experimental Studies
Observational Studies
ALL Study Designs...
Need careful definition of outcome (disease) Need careful definition of risk factor (exposure) may consume.
Key Features of an Observational Study
Case report/case series Cross-sectional (prevalence) survey Case-control study Cohort study Inferences limited to descriptions and associations With carefully designed analysis, can make stronger inferences (statistical adjustment)
Key Features of Experimental Designs
Designs: Randomized controlled (clinical) trial (RCT) Inferences: Cause and effect