Content matters - sending emails to ensure appropriate use of laboratory fees

This study examines communication interventions' impact on general practitioners' (GPs) claiming of fees for laboratory tests. GPs, who recently claimed laboratory fees, were randomly assigned to two intervention groups (Mild and Strong) or a control group. Initially, both intervention groups received an email emphasizing the importance of utilizing lab tests judiciously, the range of conditions tested, and the need for patients to bear the costs of unnecessary tests. In a subsequent phase, a reminder email was sent with different content. The Mild group received a reiteration of the initial email, while the Strong group was reminded of the economic consequences and potential impact on access to other healthcare services, as stated in the ethical guidelines of the Norwegian Medical Association. Results show that the first email had no effect on either intervention group. However, the reminder email significantly influenced the Strong group, leading to a reduction in tests and conditions. Importantly, this effect differed statistically from the impact observed in the Mild group in terms of test utilization.