Testing Treatments international
Promoting critical thinking about treatment claims
Gilbert Welch’s 14-min video discussing the risks of overdiagnosis bias and screening.
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 /lead-time-bias/
Gilbert Welch’s 10-min video explaining why survival ALWAYS rises following early detection -- even if no one is helped.
Gilbert Welch’s 12-min video explaining Type I and Type II errors, and how statistical tests can be misleading.
GET-IT provides plain language definitions of health research terms