%0 Journal Article %@ 2368-7959 %I JMIR Publications %V 9 %N 10 %P e37184 %T A Digital Intervention Using Daily Financial Incentives to Increase Medication Adherence in Severe Mental Illness: Single-Arm Longitudinal Pilot Study %A Guinart,Daniel %A Sobolev,Michael %A Patil,Bhagyashree %A Walsh,Megan %A Kane,John M %+ Department of Psychiatry, The Zucker Hillside Hospital, 75-59 263rd Street, Glen Oaks, NY, 11004, United States, 1 7184704139, daniguinart@gmail.com %K antipsychotic %K adherence %K digital %K mobile health %K mHealth %K financial incentives %D 2022 %7 12.10.2022 %9 Short Paper %J JMIR Ment Health %G English %X Background: Medication nonadherence is prevalent in severe mental illness and is associated with multiple negative outcomes. Mobile technology and financial incentives show promise to improve medication adherence; however, studies in mental health, especially with oral medications, are lacking. Objective: The aim of this paper is to assess the feasibility and effectiveness of offering financial incentives through a mobile app based on behavioral economics principles to improve medication adherence in severe mental illness. Methods: A 10-week, single-arm longitudinal pilot study was conducted. Patients earned rewards in the context of app-based adherence incentives. The reward was split into biweekly payments made in increments of US $15, minus any US $2 per day penalties for missed check-ins. Time-varying effect modeling was used to summarize the patients’ response during the study. Results: A total of 25 patients were enrolled in this pilot study, of which 72% (n=18) were female, and 48% (n=12) were of a White racial background. Median age was 24 (Q1-Q3: 20.5-30) years. Participants were more frequently diagnosed with schizophrenia and related disorders (n=9, 36%), followed by major depressive disorder (n=8, 32%). App engagement and medication adherence in the first 2 weeks were higher than in the last 8 weeks of the study. At study endpoint, app engagement remained high (n=24, Z=–3.17; P<.001), but medication adherence was not different from baseline (n=24, Z=–0.59; P=.28). Conclusions: Financial incentives were effectively delivered using an app and led to high engagement throughout the study and a significantly increased medication adherence for 2 weeks. Leveraging behavioral economics and mobile health technology can increase medication adherence in the short term. Trial Registration: ClinicalTrials.gov NCT04191876; https://clinicaltrials.gov/ct2/show/NCT04191876 %M 36222818 %R 10.2196/37184 %U https://mental.jmir.org/2022/10/e37184 %U https://doi.org/10.2196/37184 %U http://www.ncbi.nlm.nih.gov/pubmed/36222818