INcentives and ReMINDers to Improve Long-term Medication Adherence

Study Overview
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Brief Summary
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The study will test the feasibility and acceptability of using text messages and behavioral economics-based incentives to support anchoring Anti-Retroviral Therapy (ART) adherence to an existing routine in order to improve long-term ART medication adherence. The intervention phase of the three-phased study will constitute the pilot RCT. A sample of 150 clients who have initiated ART in the preceding three months will be randomized to either usual care (C = 50) or one of the two INMIND intervention groups (daily text message reminders with or without incentives) for three months (T1 = 50; T2=50). Subsequently, behavioral persistence will be evaluated for six months post-intervention. Assessments will be conducted at baseline, month 3, and month 9. The primary outcomes are 1) electronically measured mean medication adherence during the intervention and 2) six months post intervention, along with 3) timeliness of medication adherence during the intervention and 4) six months post-intervention.

Detailed Description
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Adherence of Anti-Retroviral Therapy (ART) among HIV-infected patients initiating treatment (treatment initiators) in Sub-Saharan Africa has remained low, even though the number of treatment initiators has increased in recent years. Lack of retention in care and low adherence in the first year of ART treatment are substantial barriers to virologic suppression. The current R34 study tests a novel approach for improving long-term ART adherence among treatment initiators by turning adherence into a behavioral routine. This is done in two ways: 1) anchoring ART adherence to an existing routine, and 2) providing more immediate rewards and increasing the salience through reminder messages. Insights from behavioral economics suggest that such an intervention may be particularly effective for people with present bias (those who have a tendency to give in to short-term temptation at the cost of more long-term benefits) and lack of salience (where over time, the choice of target behavior is overshadowed by more pressing needs of daily life) which have been found to be prevalent among people living with chronic medical conditions from past studies. The intervention will be tested through a pilot RCT, wherein 150 adult clients will be randomly assigned to three groups. The first intervention group would receive daily text messages that reinforce routine formation information provided to all participants (across the three groups). The second intervention group will receive the text messages, and additionally be eligible for a prize drawing based on timely ART adherence, at each monthly clinic visit. The control group will receive care as usual, consisting of routine formation information as well as adherence counseling. The intervention will last three months, with a six-month post-intervention follow up period. All participants will receive MEMS caps to record adherence, and will complete assessments over nine months (baseline, post-intervention, and six months post-intervention). The Specific Aim of the intervention phase of the study is to test the preliminary effectiveness of the intervention, including the relative effectiveness of the two different implementation approaches. This is preceded by the formative phase, with the Specific Aim of developing the intervention parameters. The intervention phase is succeeded by the adaptation phase, whose Specific Aim is to collect data in preparation for a subsequent R01 application.

Official Title
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INcentives and ReMINDers to Improve Long-term Medication Adherence

Conditions
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HIV/AIDS

Intervention / Treatment
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* Behavioral: Daily Text Messages
* Behavioral: Incentivization based on timely ART adherence


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and female clients age 18 and older. Started ART at Mildmay or another clinic within the preceding three months but have since been receiving care at Mildmay. Able to speak and understand either English or Luganda. Have their own cell phone or have consistent access to someone else's phone. Willing to receive daily text messages for the 3 months of intervention duration. Willing and able to use the MEMS caps distributed for adherence verification for the duration of the study. Exclusion Criteria: Not mentally fit to consent. Language other than Luganda or English. Not willing to consistently use the MEMS caps device for adherence measurement.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: A pilot randomized controlled trial with two intervention arms and a control group, that will receive intervention for three months with follow-on assessment for six months after the intervention period ends.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Control<br>This arm will receive care as usual, including the adherence support mechanisms that are part of usual care practices. At recruitment participant will be explained the importance of pill-taking. All participants (including in the control group) will receive a leaflet containing detailed information on how to establish healthy pill-taking routines. Finally, clinic staff will counsel participants on how to select an already regularly routine behavior that occurs at roughly the same time each day that forms the basis of their implementation plan. | |
| Experimental: Intervention group receiving messages (Messages Group)<br>Participants will receive the same information as those in the Control Group, but in addition, receive the Daily Text Message Intervention. | Behavioral: Daily Text Messages<br>* Participants will receive daily text message reminders to use their routine behavior to trigger medication adherence.<br>|
| Experimental: Intervention group receiving messages and incentives (Incentives Group)<br>Participants will receive the same information as the Control group. Additionally, they will receive the Daily Text Message Intervention and will be eligible for prize drawings. | Behavioral: Daily Text Messages<br>* Participants will receive daily text message reminders to use their routine behavior to trigger medication adherence.<br>Behavioral: Incentivization based on timely ART adherence<br>* Participants will be eligible to draw a prize if they take their medication within +/- one hour of the stated existing routine to which pill-taking is anchored on at least 70% of days between recruitment and the 3-month study visit.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Electronically measured mean medication adherence during intervention | MEMS-data will be collected continuously over the course of the three-month intervention period allowing us to investigate mean adherence. Only one of the ART medications will be used to calculate the primary adherence variable (# of actual bottle openings / # of prescribed bottle openings). | Three months | 
| Electronically measured mean medication adherence post intervention | MEMS-data will be collected continuously over the course of the six-month post intervention period allowing for the investigation of post-intervention mean adherence. Only one of the ART medications will be used to calculate the primary adherence variable (# of actual bottle openings / # of prescribed bottle openings). | Six months post-intervention | 
| Routinization of ART adherence during intervention | A novel measure of routine adherence (that it is explicitly based on the temporal pattern of pill-taking) will be used. It is calculated as the fraction of scheduled pills taken within a one-hour window around the typical time that participants report completing their existing routine behavior that anchors their pill-taking. This measure provides an objective way for determining behavioral automaticity of pill-taking. | Three months | 
| Routinization of ART adherence post-intervention | This measure would be calculated as a fraction of scheduled pills taken within a one-hour window around the typical time that participants report completing their existing routine behavior that anchors their pill-taking, for all visits made post-intervention. | Six months post-intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Retention in care | Retention in care will be measured as the fraction of participants recruited who are still active clients at the clinic at month 9. | Month 9 | 
| Viral Suppression | HIV RNA (viral load) is the secondary outcome measure, and the investigators will also examine intervention effects on mean change in log-transformed viral load. Viral loads are now part of routine clinical care in Uganda and will be chart abstracted. | Month 9 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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ART Adherence, Reminders, Behavioral Economics, Viral Suppression, Long-term Adherence, Routines, Habit Formation