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Understanding Overdiagnosis bias
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3-1 Do the outcomes measured matter to you? |
Gilbert Welch’s 14-min video discussing the risks of overdiagnosis bias and screening.
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 (https://www.youtube.com/watch?v=s7QNhE59s9Q).
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 http://en.testingtreatments.org/lead-time-bias/