Improving Medication Adherence Among Underserved Patients With Type 2 Diabetes

August 6, 2020 updated by: Lindsay Mayberry, Vanderbilt University Medical Center
This study evaluates a mobile phone-delivered intervention, called REACH (Rapid Education/Encouragement And Communications for Health), in supporting adults with type 2 diabetes in their self-management relative to a control group. The goal of this study is to determine if individually tailored content (based on the Information-Motivation-Behavioral Skills Model) delivered to the participant via text messages can improve the participant's glycemic control and adherence to diabetes medications. We will test whether our intervention improves adherence-related information, motivation, and behavioral skills and whether improving these mechanisms drives improvements in adherence and, in turn, glycemic control.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
512

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Federally Qualified Health Centers and Vanderbilt Primary Care Clinics

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Adults aged 18 years and older
  • Individuals who have received a diagnosis for type 2 diabetes mellitus
  • Enrolled as a patient at a participating community health center
  • Individuals currently being treated with oral and/or injectable diabetes medications

Exclusion Criteria:

  • Non-English speakers
  • Individuals who report they do not have a cell phone
  • Individuals unwilling and/or not able to provide written informed consent
  • Individuals with unintelligible speech (e.g., dysarthria)
  • Individuals with a severe hearing or visual impairment
  • Individuals who report a caregiver administers their diabetes medications Individuals who fail the cognitive screener administered during the baseline survey
  • Individuals who cannot receive, read, and respond to a text after instruction from a trained research assistant
  • Individuals whose most recent (within 12 months) HbA1c value was 6.8% or greater

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Supportive Care
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: REACH

Participants will receive REACH text messages (individual-focused text messaging tailored to user's individual barriers to adherence and targeted to address other self-care behaviors) for 12 months.

All participants will also receive text messages advising how to access their study A1c test results, receive quarterly newsletters on healthy living with diabetes, and have access to a Helpline for study- and diabetes medication-related questions.
Behavioral: REACH
The intervention consists of daily text messaging tailored to user's individual barriers to medication adherence, text messages assessing user's adherence with feedback on progress, plus text messaging targeting other self-care behaviors.
Behavioral: Helpline and A1c results
Participants complete study assessments, receive text messages advising how to access study A1c results, receive quarterly newsletters on healthy living with diabetes, and have access to a helpline for study- or diabetes medication-related questions.
Experimental: REACH + FAMS

In addition to the REACH text messages tailored to user's individual barriers to adherence, participants will receive FAMS components (monthly phone coaching and text messages supporting a goal set in coaching, plus the option to invite a family member/support person to receive text messages) for six months. After six months, participants in this arm will receive REACH text messages only.

All participants will also receive text messages advising how to access their study A1c test results, receive quarterly newsletters on healthy living with diabetes, and have access to a Helpline for study- and diabetes medication-related questions.
Behavioral: Helpline and A1c results
Participants complete study assessments, receive text messages advising how to access study A1c results, receive quarterly newsletters on healthy living with diabetes, and have access to a helpline for study- or diabetes medication-related questions.
Behavioral: REACH + FAMS
The intervention consists of REACH individually-focused text messaging, plus family-focused phone coaching session, goal-focused text messaging, and the option to invite a family member/support person to receive text messaging.
Other Names:
  • NCT02481596
Active Comparator: Helpline and A1c results

Participants assigned to the control group will complete measures at each time point and maintain care as usual (i.e., medical treatment and physician monitoring).

All participants will receive text messages advising how to access their study A1c test results, receive quarterly newsletters on healthy living with diabetes, and have access to a Helpline for study- and diabetes medication-related questions.
Behavioral: Helpline and A1c results
Participants complete study assessments, receive text messages advising how to access study A1c results, receive quarterly newsletters on healthy living with diabetes, and have access to a helpline for study- or diabetes medication-related questions.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in Glycemic Control as Indicated by Hemoglobin A1c (HbA1c)
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by Hemoglobin A1c (%) with higher values indicating worse glycemic control and an improvement of 0.5% considered clinically meaningful
Baseline, 3 months, 6 months, 12 months, 15 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Self-reported Medication Adherence
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by the Summary of Diabetes Self-Care Activities (SDSCA) Medications subscale; response options are days in the last week ranging from 0 to 7, with 7 representing perfect adherence
Baseline, 3 months, 6 months, 12 months, 15 months
Change in Self-reported Medication Adherence
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by the Adherence to Refills and Medications Scale for Diabetes (ARMS-D); reverse coded such that higher scores indicate better adherence on a scale from 11 to 44
Baseline, 3 months, 6 months, 12 months, 15 months

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Change in Adherence to Dietary Behavior
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by the Personal Diabetes Questionnaire diet subscale "Use of information for decision making"; possible range 1-6, higher indicates more use of dietary information (better)
Baseline, 3 months, 6 months, 12 months, 15 months
Change in Adherence to Dietary Behavior
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
Personal Diabetes Questionnaire diet subscale "Problem eating behavior"; possible range 1-6 with higher indicating more problem eating behavior (worse)
Baseline, 3 months, 6 months, 12 months, 15 months
Change in Physical Activity
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by International Physical Activity Questionnaire-Short form [metabolic equivalent minutes (MET-minutes) per week] where more MET-minutes per week indicates more physical activity
Baseline, 3 months, 6 months, 12 months, 15 months
Change in Glycemic Control - REACH Only vs. Control & REACH+FAMS vs. Control
Time Frame: Baseline, 3 months, 6 months, 12 months, 15 months
as measured by hemoglobin A1c (HbA1c, %) We may be under-powered to for these comparative analyses.
Baseline, 3 months, 6 months, 12 months, 15 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Vanderbilt University Medical Center

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Lindsay S Mayberry, MS, PhD, Vanderbilt University Medical Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 23, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 4, 2019

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 4, 2019

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 9, 2015

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 31, 2015

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 6, 2015

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 17, 2020

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 6, 2020

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2020

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 140562
  • 1R01DK100694-01A1 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Individual participant data collected during the trial will be de-identified and made available following publication of the 15-month trial results to researchers who provide a methodologically sound proposal.

IPD Sharing Time Frame

Beginning 6 months after final trial results publication. No end date.

IPD Sharing Access Criteria

Approval of a proposal by the study PI.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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