Different categories of evidence

Research can take multiple forms. Each of the forms of evidence has potential strengths and weaknesses. In theory these forms of research can be arranged into a hierarchy or ladder, with a pecking order of the evidence.

In order to understand the hierarchy we will first run through different forms or categories of evidence.

This podcast covers

  • Expert opinion
  • Case report
  • Case series
  • Case control
  • Prospective Cohort Study
  • Retrospective Cohort Study
  • Controlled trials
  • Randomised control trials
  • Systematic Reviews
  • Meta-analyses

Once you’ve listened help consolidate the topics covered with the questions below.