The integration of dermatology experts into primary care to assess and treat patients with skin lesions is cost-effective: A quasi-experimental study.

Background: The management of patients with skin changes can be challenging in primary healthcare; general practitioners (GPs) often lack the expertise to make accurate assessments and treatment decisions. The standard care pathway for skin changes can result in extended treatment times and costs.

Objectives: This study was designed to evaluate the cost-effectiveness of integrating a dermatologist into the primary care setting to assess and treat patients with skin disorders. The primary outcome was the incremental cost-effectiveness ratio (ICER) for each malignant or pre-malignant skin disease found and treated. The secondary outcomes included ICER for any treated skin finding, number needed to excise to find malignant or pre-malignant skin disease, number of hospital referrals required and changes in quality of life (QoL) in the presence and absence of the integration.

Methods: This was a quasi-experimental cohort study conducted at three primary healthcare centres in Finland. In the two intervention centres, patients with skin findings visited a dermatologist; in the control centre they visited a GP. Cost-effectiveness was assessed using the incremental cost-effectiveness ratio (ICER). QoL was assessed with the PROMIS v1.2, calculative EQ-5D-3L and PROMIS Anxiety 4a instruments.

Results: In total, 186 integration and 176 control patients were included. For an additional patient treated for a (pre-)malignant skin disease, the ICER was €852 lower and with any skin disease €381 lower in the integration group than with standard care. Fewer biopsies were required for each malignant or pre-malignant skin disease in the integration group compared to the control group (2.1 and 6.5 per patient; p < 0.001) and lower proportion of patients were referred to hospital (8.1 vs. 17.1%, p < 0.001). Patient QoL did not differ between groups.

Conclusions: The integration of dermatological expertise into primary care settings is cost-effective and can streamline the management of patients with skin conditions without worsening their QoL.