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Behavioral Nudges as Patient Decision Support for Medication Adherence: The ENCOURAGE Randomized Controlled Trial
Benjamin D Horne1, Joseph B Muhlestein2, Donald L Lappé2
1Intermountain Medical Center Heart Institute, Salt Lake City, Utah, USA; Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, California, USA.
American Heart Journal
|November 19, 2021
Summary
Behavioral nudges significantly improved statin adherence in cardiology patients, increasing the proportion of days covered (PDC). This AI-driven approach enhanced medication adherence with minimal human input.
Area of Science:
- Cardiology
- Behavioral Science
- Health Informatics
Background:
- Medication adherence, particularly for statins, is a significant challenge due to patient-driven healthcare decisions outside clinical settings.
- While behavioral nudging has influenced clinician behavior, its impact on patient decision-making requires further investigation.
- This study aimed to assess the efficacy of behavioral nudges in improving statin adherence.
Purpose of the Study:
- To evaluate the effectiveness of personalized behavioral nudges in increasing statin adherence.
- To measure adherence using the proportion of days covered (PDC) over a 12-month period.
- To explore the potential of AI-driven interventions in precision patient decision support.
Main Methods:
- A 12-month, unblinded, randomized controlled trial involving adult cardiology patients prescribed statins.
- Participants were randomized 1:1 to a control group or a group receiving personalized behavioral nudges.
- Nudge personalization utilized machine learning based on psychographic assessments, demographics, social determinants, and risk scores; adherence was tracked via insurance claims data.
Main Results:
- The nudge group demonstrated a significantly higher statin PDC (0.742±0.318) compared to the control group (0.639±0.358, P=0.042).
- A greater proportion of patients in the nudge group achieved the adherence threshold (PDC ≥80%) compared to controls (66.3% vs 50.5%, P=0.036).
- No significant difference was observed in the composite endpoint of death, myocardial infarction, stroke, and revascularization between the groups.
Conclusions:
- AI-powered behavioral nudges led to a clinically meaningful improvement in statin adherence among cardiology patients.
- This precision patient decision support system effectively utilized automated nudge design and delivery.
- The findings highlight the potential of technology-driven interventions to enhance medication adherence.
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