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CompletedNCT02174562Updated Aug 10, 2020Results posted

Improving Medication Adherence in Older African Americans With Diabetes

An interventional study of Primary Care-Occupational Therapy and Enhanced Usual Care in Type 2 Diabetes and Mild Cognitive Impairment, sponsored by Thomas Jefferson University. Completed at 1 site in United States. Open to participants aged 60 Years and older. Per ClinicalTrials.gov, last updated 2020-08-10.

Sponsored by Thomas Jefferson University · Not applicable, Interventional, and Prevention

Phase
Not applicable
Study type
Interventional
Enrollment
101
Allocation
Randomized
Ages
60 Years and older
Sex
All
01

Study summary

This research aims to help older African Americans with diabetes and mild memory problems improve how they take their medications and control their diabetes. This may preserve their independence and health, prevent cognitive and functional decline, and reduce health care costs. As the population ages and becomes more racially diverse, finding ways to achieve these outcomes has great public health importance.

Read the detailed description

The prevalence of type 2 diabetes (DM) in older persons is increasing rapidly. DM increases the risk for Mild Cognitive Impairment (MCI), which is a transition state between normal cognition and dementia that is often characterized by memory and executive function deficits. These deficits reduce adherence to DM medications, which worsens glycemic control and increases the risk for adverse DM-related health outcomes. Improving medication adherence may prevent these outcomes and reduce health care costs. This is important to all older persons with DM but particularly to older African Americans (AAs). They have twice the rate of DM, worse cognitive function, lower medication adherence, and worse glycemic control than whites. One million older AAs now have DM and their number will double by 2030. Because 30% also have MCI, low medication adherence is an important problem for them. This necessitates culturally relevant interventions that compensate for their cognitive deficits and improves their medication adherence and glycemic control. We propose a randomized controlled clinical trial to test the efficacy of a collaborative Primary Care-Occupational Therapy (PC-OT) intervention to lower hemoglobin A1c (HbA1c) levels in older AAs with DM, MCI, HbA1c ≥ 7.5%, and ≤ 80% adherence to an oral hypoglycemic medication. PC-OT consists of: 1) primary care physician (PCP) - occupational therapist (OT) collaboration; 2) DM education tailored to cognitive impairment; 3) in-home OT cognitive-functional assessment; and 4) OT-delivered Behavior Activation to increase adherence to medications and other diabetes self-management (DSM) practices (e.g., diet). We will recruit 100 participants from primary care clinics and randomize them to PC-OT or Enhanced Usual Care (EUC). EUC is usual medical care plus low intensity DM education delivered by community health workers. Participants in both PC-OT and EUC will have 6 initial in-home treatment sessions over 3 months, and then 3 booster sessions during this 12 month study. The primary outcome is a reduction in HbA1c of 0.5%, which reduces the risk of adverse medical events. The primary efficacy analysis compares the proportion of participants in PC-OT and EUC who achieve this outcome at month 6 (short term effect) and at month 12 (maintenance effect). We will measure medication adherence using an electronic Medication Event Monitoring System, prescription refills, and self-reports. A secondary aim determines if improving medication adherence mediates PC-OT's impact on HbA1c levels. We will also evaluate PC-OT's effect on other DSM practices; ER visits and hospitalizations; cognition; function; mood; and quality of life; and PC-OT's costs and net financial benefits. This is the first study to determine if PCPs, collaborating with OTs (who are experts in developing strategies to compensate for cognitive/physical deficits), can improve medication adherence and glycemic control, and prevent cognitive and functional decline in older persons with DM and MCI. If PC-OT is effective in a high risk population of older AAs, its benefits may extend to all older persons with DM and have enormous public health significance.

02

Conditions studied

  • Type 2 Diabetes
  • Mild Cognitive Impairment

Keywords

  • Type 2 diabetes
  • Mild Cognitive Impairment
03

In context

Diabetes Mellitus

10,925 studies on the registry are indexed under Diabetes Mellitus; 1,319 are open to participants now.

This study's enrollment of 101 is above the median of 80 across 8,367 interventional studies indexed under Diabetes Mellitus.

Browse Diabetes Mellitus studies →

Lead sponsor

Thomas Jefferson University is the lead sponsor of 384 studies on the registry; 71 are open to participants now.

Of its 44 completed or terminated interventional studies of FDA-regulated products, 20 (45%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
60 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Age 60 years and older.
  2. Self-identified as African American, black, black American, or black/Caribbean.
  3. Type II DM (i.e., physician diagnosis and medication treatment).
  4. HbA1c level ≥ 7.5%.
  5. MCI, based on National Institute on Aging/Alzheimer's Association (NIA/AA) criteria.
  6. ≤ 80% adherence to an oral hypoglycemic medication or insuling, as documented during a run-in phase using a Medication Event Monitoring System (MEMS).

Exclusion criteria

Exclusion Criteria:

  1. Dementia, based on National Institute on Aging/Alzheimer's Association criteria.
  2. DSM-V psychiatric disorder other than depressive disorders.
  3. End-stage renal disease requiring dialysis.
  4. Hearing/Vision (i.e., severe diabetic retinopathy) or motor (e.g., peripheral neuropathy) impairment that precludes research participation.
05

Study design

Phase
Not applicable
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
101 participants (actual)

Study arms

  • Experimental
    Primary Care-Occupational Therapy

    PC-OT consists of: 1) primary care physician (PCP) - occupational therapist (OT) collaboration; 2) DM education tailored to cognitive impairment; 3) in-home OT cognitive-functional assessment; and 4) OT-delivered Behavior Activation to increase adherence to medications and other diabetes self-management (DSM) practices (e.g., diet).

    Behavioral: Primary Care-Occupational Therapy

  • Placebo comparator
    Enhanced Usual Care

    Usual care enhanced with education and controls for attention

    Behavioral: Enhanced Usual Care

Interventions

  • BehavioralPrimary Care-Occupational Therapy

    PC-OT consists of: 1) primary care physician (PCP) - occupational therapist (OT) collaboration; 2) DM education tailored to cognitive impairment; 3) in-home OT cognitive-functional assessment; and 4) OT-delivered Behavior Activation to increase adherence to medications and other diabetes self-management (DSM) practices (e.g., diet).

  • BehavioralEnhanced Usual Care

    Usual care enhanced with education and attention

06

What researchers measure

Primary outcomes

  1. Percent of Participants With Improvement in Hemoglobin A1c by 0.5%"

    Percent of participants who had a reduction (improvement) of at least .5% in hemoglobin A1c from baseline to 6 months

    Time frame: 6 months

Secondary outcomes

  1. Adherence as Measured By Percentage of Doses Taken as Prescribed

    This was assessed objectively using a Medication Event Monitoring System (MEMS) bottle. The MEMS measured daily bottle openings continuously to assess adherence to insulin or an oral hypoglycemic agent. The adherence rate is the percent of doses that were taken as prescribed.

    Time frame: 4-6 months

07

Results

Posted Jun 16, 2020

Participant flow

Participant flow — Overall Study
MilestonePrimary Care-Occupational TherapyEnhanced Usual Care
Started5051
Completed4146
Not completed95
Withdrew: Withdrawal by subject72
Withdrew: Death20
Withdrew: Lost to follow-up03

Outcome measures

PrimaryPercent of Participants With Improvement in Hemoglobin A1c by 0.5%"

Percent of participants who had a reduction (improvement) of at least .5% in hemoglobin A1c from baseline to 6 months

Time frame:
6 months
Reported as:
Count of participants · Participants
Percent of Participants With Improvement in Hemoglobin A1c by 0.5%"
ParticipantsPrimary Care-Occupational TherapyEnhanced Usual Care
Percent of Participants With Improvement in Hemoglobin A1c by 0.5%"2522
Statistical analysis
  • Primary Care-Occupational Therapy vs Enhanced Usual Care · Poisson regression with robust SEs · p = 0.31 (0.05 was the a priori level of significance.) · Risk ratio (rr): 1.21 · 95% CI 0.84 to 1.75PC-OT is the numerator, Enhanced Usual care is the denominator
SecondaryAdherence as Measured By Percentage of Doses Taken as Prescribed

This was assessed objectively using a Medication Event Monitoring System (MEMS) bottle. The MEMS measured daily bottle openings continuously to assess adherence to insulin or an oral hypoglycemic agent. The adherence rate is the percent of doses that were taken as prescribed.

Time frame:
4-6 months
Reported as:
Least squares mean · percentage of doses taken during period
Adherence as Measured By Percentage of Doses Taken as Prescribed
percentage of doses taken during periodPrimary Care-Occupational TherapyEnhanced Usual Care
Adherence as Measured By Percentage of Doses Taken as Prescribed61 (53 to 69)60 (52 to 68)
Statistical analysis
  • Primary Care-Occupational Therapy vs Enhanced Usual Care · Mixed Models Analysis · p = 0.87P-value is for comparison of least squares means for period 2 (months 4-6).

Adverse events

Collected over 1 year. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Primary Care-Occupational Therapy2/50 (4%)18/50 (36%)0/50 (0%)
Enhanced Usual Care0/51 (0%)16/51 (31.4%)0/51 (0%)
Most frequent serious events
Showing 10 of 18
Most frequent serious events
EventPrimary Care-Occupational TherapyEnhanced Usual Care
Cardiac eventsCardiac disorders8/504/51
InfectionInfections and infestations3/507/51
COPD, pneumoniaRespiratory, thoracic and mediastinal disorders5/504/51
GIGastrointestinal disorders4/502/51
DehydrationMetabolism and nutrition disorders2/500/51
Stroke/TIAVascular disorders2/501/51
DiabetesEndocrine disorders0/502/51
CancerNeoplasms benign, malignant and unspecified (incl cysts and polyps)1/502/51
Renal failure/kidney injuryRenal and urinary disorders0/502/51
Facial FractureMusculoskeletal and connective tissue disorders1/500/51

Baseline characteristics

A total of 101 participants with MCI were randomized to PC-OT (n = 50) or EUC (n = 51). The average age of participants was 68.4 (6.4) years (range = 60-85 years), and 62% were women. All were African American.

Age, Continuous
Age, Continuous(years)Primary Care-Occupational TherapyEnhanced Usual CareTotal
Mean68.2 ± 6.168.7 ± 6.768.4 ± 6.4
Sex: Female, Male
Sex: Female, Male(Participants)Primary Care-Occupational TherapyEnhanced Usual CareTotal
Female313263
Male191938
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Primary Care-Occupational TherapyEnhanced Usual CareTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American5051101
White000
More than one race000
Unknown or Not Reported000
Region of Enrollment
Region of Enrollment(participants)Primary Care-Occupational TherapyEnhanced Usual CareTotal
United States5051101
08

Study locations

1 site
  • Thomas Jefferson University
    Philadelphia, Pennsylvania 19107, United States
09

References and documents

Publications

  • Rovner BW, Casten RJ. Emergency department visits in African Americans with mild cognitive impairment and diabetes. J Diabetes Complications. 2021 May;35(5):107905. doi: 10.1016/j.jdiacomp.2021.107905. Epub 2021 Mar 16. PubMed 33752964 ↗
  • Rovner BW, Casten RJ, Piersol CV, White N, Kelley M, Leiby BE. Improving Glycemic Control in African Americans With Diabetes and Mild Cognitive Impairment. J Am Geriatr Soc. 2020 May;68(5):1015-1022. doi: 10.1111/jgs.16339. Epub 2020 Feb 11. PubMed 32043561 ↗

Study documents

  • Protocol and statistical analysis plan · Jan 26, 2015

Documents are hosted by the registry — open the source record to download them.

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 10, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02174562
Lead sponsor
Thomas Jefferson University
Collaborators
Johns Hopkins University
Responsible party
Sponsor
First posted
Jun 25, 2014
Start date
Jul 2014
Primary completion
Dec 2019
Completion
Dec 2019
Results posted
Jun 16, 2020
Last update
Aug 10, 2020

Study contacts

Barry W Rovner, MD
principal investigator · Thomas Jefferson University

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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