Screening and overdiagnosis: public health implications

Area of Science:

• Public Health
• Medical Diagnostics
• Health Policy

Background:

• Overdiagnosis involves identifying conditions with no significant health risks, often driven by advanced screening technologies and expanded diagnostic criteria.
• Contributing factors include fear of missed diagnoses, litigation concerns, financial incentives, and patient reassurance seeking.
• This phenomenon is a growing, yet poorly understood, public health challenge.

Discussion:

• The primary consequence of overdiagnosis is overtreatment, which offers no patient benefit but incurs harms and costs.
• Overtreatment also detracts healthcare professionals from treating genuinely ill patients.
• Identifying overdiagnosis, particularly from screening, is difficult at individual and population levels.

Key Insights:

• Overdiagnosis can occur even with effective and efficient screening programs.
• Reducing overdiagnosis requires enhanced awareness among healthcare professionals and patients.
• Implementing active surveillance and delayed treatment strategies, guided by biomarker profiling, can help manage overdiagnosed conditions.

Outlook:

• Targeted screening approaches and balanced communication regarding screening risks and benefits are essential.
• Further research is imperative to quantify the public health burden and implications of screening-driven overdiagnosis.
• Developing robust methods for prognosis estimation is key to differentiating true disease from overdiagnosed conditions.