Understanding Overdiagnosis bias

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  • Format Videos
  • Language/s English
  • Target Audience Further education
  • EBM Stage 0 - Why EBM?
  • Duration 5-15 mins
  • Difficulty Intermediate

Key Concepts addressed

Details

Gilbert Welch discusses overdiagnosis bias in this 14 minute video, and explains why survival ALWAYS rises following early detection — even if no one is helped.

Overdiagnosis bias is one of two explanations for why survival statistics (e.g. median survival, 5-year survival, 10-year survival) can be so misleading.

The other explanation is lead-time bias, which can be viewed at /lead-time-bias/

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