Beyond accuracy: hidden motives in diagnostic testing.

Background: Diagnostic decision-making is usually disease-focussed and intended to examine the patient's medical condition accurately. But diagnostic interventions may serve further purposes that are not yet fully understood.

Objective: To explore GPs' diagnostic behaviour not related to confirming or refuting a specific disease.

Methods: We recorded 295 primary care consultations in 12 practices. One hundred thirty-four consultations comprised at least one diagnostic episode. GPs were asked to reflect on their own diagnostic thinking in interviews for every single case. Qualitative and quantitative analyses were applied with focus on the GPs' cognitive processes during diagnostic decision-making.

Results: Primary care physicians clearly stated that they requested some tests for other reasons than diagnosing disease. A feeling of uncertainty stimulated diagnostic procedures aiming to regulate the anticipation of regret. We identified patients' reassurance, patients' requests and strategic issues as further motives for diagnostic actions.

Conclusion: Besides focussing on disease in the diagnostic process, emotional and strategic goals are hidden motives that play a critical role in clinical decision-making. They might even represent an initial factor in a cascade of interventions leading to overdiagnosis. How GPs might control these influences provides an important aspect for further research, practice and teaching.