Communication that empowers the public, patients, clinicians, and policy makers to think differently about overdiagnosis will help support a more sustainable healthcare future for all, What are the key messages to be communicated?Understanding of overdiagnosis among the general public and health professionals is limited, so it is essential to communicate what it means for individuals, the health system, and society (box 1). By definition, overdiagnosis will not improve prognosis and will probably harm individuals (for example, by unnecessary intervention) or society (opportunity costs). For individuals, it is important to communicate the nature (physical or psychological), likelihood, and duration of the harms. For societies with free public healthcare, the financial strain and opportunity cost are usually at system level-resources wasted on unnecessary tests and treatments are unavailable for people in greater need. But in private healthcare systems, overdiagnosis can be a huge personal financial burden, even for those with insurance.Communication is further complicated because it is usually impossible to know whether an individual has been overdiagnosed or benefited from the diagnosis-overdiagnosis can only be observed at the aggregate level. Recent efforts to communicate the concept and likelihood of overdiagnosis in breast screening have had some success, albeit with much room for improvement. When given a patient decision aid including an infographic and icon array (figure⇓), 29% of women understood both the concept and quantitative outcomes of breast screening (including deaths avoided, false positive results, and overdiagnosis); 59% of women understood the conceptual information alone.
Communication based strategies to mitigate overdiagnosisSeveral communication based strategies have been applied in the areas of overtesting and overtreatment and directed at individual, community, or policy levels (box 2).
Strategies for individualsShared decision making is a consultation process where a clinician and patient jointly make a health decision. It changes Overdiagnosis occurs when a diagnosis is "correct" according to current professional standards but when the diagnosis or associated treatment has a low probability of benefiting the person diagnosed. 2 It is caused by a range of factors such as: • Use of increasingly sensitive tests that identify abnormalities that are indolent, non-progressive, or regressive (overdetection)• Expanded definitions of disease-for example, attention-deficit/hyperactivity disorder and dementia-and lowering of disease thresholds, such as osteoporosis (overdefinition)• Creation of pseudodiseases (also called disease mongering), such as low testosterone and restless leg syndrome• Clinicians' fear of missing a diagnosis or litigation• Public enthusiasm for screening or testing and desire for reassurance
• Financial incentives
Potential consequences of overdiagnosis• Psychological and behavioural effects of disease labelling• Physical harms and side effects of unnecessary tests or tr...