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.
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