Understanding Overdiagnosis bias

Format: Videos
Language/s: English
Resource Link: View the Video
Short Description:

Gilbert Welch’s 14-min video discussing the risks of overdiagnosis bias and screening.

Key Concepts addressed:


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://th.testingtreatments.org/lead-time-bias/