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Psychology

Heirarchy of Evidence

Chart with the Heirarchy of Evidence.

Image Transcription:

The hierarchy of evidence from from highest to lowest:

  • Secondary, pre-appraised, or filtered:
    • Clinical Practice Guidelines
    • Meta-Analyses & Systematic Reviews
  • Primary Studies:
    • Randomized Controlled Trial (Prospective, tests treatment)
    • Observational Studies:
      • Cohort Studies (Prospective, exposed cohort is observed for outcome)
      • Case Control Studies (Retrospective, subjects already of interest looking for risk factors)
  • No design:
    • Case Report or Case Series, Narrative Reviews, Expert Opinions, Editorials
  • No humans involved:
    • Animal and Laboratory Studies

Look for Tests & Test Reviews

Look for Test Reviews