Impact of a store-and-forward teledermatology intervention versus usual care on delay before beginning treatment: A pragmatic cluster-randomized trial in ambulatory care

Introduction: In France, 66% of patients forego getting specialized care by dermatologists because of difficulty obtaining appointments. Store-and-forward teledermatology could improve how promptly treatment begins by reducing the delay in obtaining a specialist's opinion. In this study, we compared the delay before care between general practitioners (GPs) using a store-and-forward teledermatology intervention and GPs addressing their patients with a standard referral letter. Methods: We performed an open-label, pragmatic cluster-randomized controlled trial with two parallel arms. GP clinics in Paris (France) were randomly assigned to use either teledermatology referral (use of electronics to send clinical images taken using a mobile phone) or conventional referral (using standard letters) to care for patients for whom a dermatologist's advice was needed for the diagnosis or treatment of skin lesions. Dermatologists integrated responses to teledermatology requests in their usual schedule. Patients were followed up for three months. Primary outcome was the delay, in days, between the GP's consultation and a reply by the specialist allowing treatment to begin. Analyses were adjusted for clustering of GPs and identities of dermatologists. Results: Between February and June 2014, 103 patients were included in the study (53 patients of 20 GPs in the intervention group). The median delay between the initial GP's consultation and the reply allowing for treatment to begin was four days in the intervention group and 40 days in the control group (adjusted hazard ratio=2.55; p<0.011). Discussion: We showed that a simple store-and-forward teledermatology intervention significantly reduced the delay before beginning care (ClinicalTrials.gov identifier: NCT02122432).