What is overdiagnose bias?

Overdiagnosis bias occurs when a condition is diagnosed more frequently than it actually exists, often due to improved screening methods or heightened awareness. This can lead to the identification of cases that would not have caused harm if left untreated, resulting in unnecessary treatment and anxiety for patients. The bias can distort perceptions of disease prevalence and effectiveness of interventions, as it may appear that more individuals are affected by a condition than is true.