Number Needed to Harm: Treatments Can Hurt You

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Many therapies you’ve been sold as “awesome” were, in fact, somewhat incremental with respect to benefits. But another problem is that a lot of those therapies are anything but benign. They come not only with costs, but also with side effects or problems.

  • Format Videos
  • Language/s English
  • Target Audience Further education, Researchers, Self-directed learning
  • EBM Stage 4 - Decision making
  • Duration 5-15 mins
  • Difficulty Intermediate

Key Concepts addressed


This six-minute video by Healthcare Triage explains Number Needed to Harm (NNH) and how it can be used to show the balance between benefits and harms of treatments.


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