Signals of overdiagnosis
Gilbert Welch’s 8-min video showing how population screening for disease leads to overdiagnosis.Key Concepts addressed:
Gilbert Welch’s 8-min video showing how population screening for disease leads to overdiagnosis, illustrating how ‘earlier treatment is not necessarily better treatment’.
The population signals of overdiagnosis are:
- Rising disease incidence with unchanging mortality
- Increase in early stage disease with little decrease in late stage disease
- Substantial increase in small tumours with little decrease in larger tumours.
These patterns are illustrated with data about thyroid cancer, melanoma, kidney cancer, and breast cancer.