Understanding lead-time bias

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  • Format Videos
  • Language/s English
  • Target Audience Further education
  • EBM Stage 3 - Appraising evidence
  • Duration 5-15 mins
  • Difficulty Introductory

Key Concepts addressed

Details

Gilbert Welch’s 10-min video explaining why survival ALWAYS rises following early detection — even if no one is helped.  This is one of two explanations why survival statistics (e.g. median survival, 5-year survival, 10-year survival) can be so misleading.

The other explanation is overdiagnosis bias, which is discussed here:

/overdiagnosis-bias/

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