Antihypertensive Medication Exposure as Risk for Impaired Glucose Tolerance: A PEAR Sub-Study

March 30, 2018 updated by: University of Florida
The purpose of this study is to determine if, in a subset of patients treated with a beta-blocker and diuretic, prediabetes is detectable to a greater extent through a 2-hour oral glucose tolerance test (OGTT) compared to fasting glucose measurement.

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.

Detailed Description

Beta-blockers and diuretics have a well-established role in treating hypertension and are frequently used first-line. However, it is increasingly evident that these medications have harmful metabolic effects. The Pharmacogenomic Evaluation of Antihypertensive Responses (PEAR - NCT00246519) study was a greater than 700 participant, randomized, parallel assignment trial, aimed at determining the genetic factors that influence response to both a beta-blocker (atenolol) and a diuretic (hydrochlorothiazide [HCTZ]). The PEAR trial design includes evaluation at baseline, after monotherapy with either medication, and after combination therapy with both medications. This pilot, PEAR sub-study aims to characterize the ability of two diagnostics tests (fasting glucose versus glucose 2-hours after an OGTT) to detect prediabetes development prior to blood pressure medication use, after monotherapy (with atenolol or HCTZ) and after combination therapy (with atenolol and HCTZ).

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.
Observational

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.
26

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
    • Florida
      • Gainesville, Florida, United States, 32610
        • University of Florida Department of Community Health and Family Medicine

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 to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Primary care clinic, PEAR participants

Description

Inclusion Criteria:

  • participation in PEAR:

    • an average seated home DBP > 85 mmHg and home SBP < 180 mmHg.
    • subjects must also have an average seated (> 5 minutes) clinic DBP between 90 mmHg and 110 mmHg and SBP < 180 mmHg.

Exclusion Criteria:

  • secondary forms of HTN,
  • patients currently treated with three or more antihypertensive drugs, isolated systolic HTN,
  • other diseases requiring treatment with BP lowering medications,
  • heart rate < 55 beats/min,
  • known cardiovascular disease (including history of angina pectoris, heart failure, presence of a cardiac pacemaker, history of myocardial infarction or revascularization procedure, or cerebrovascular disease, including stroke and TIA),
  • diabetes mellitus (Type 1 or 2),
  • renal insufficiency (serum creatinine > 1.5 in men or 1.4 in women),
  • primary renal disease,
  • pregnancy or lactation,
  • liver enzymes > 2.5 upper limits of normal,
  • current treatment with NSAIDS,
  • COX2-inhibitors,
  • oral contraceptives or estrogen.

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
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.
PEAR Participants
All participants eligible for PEAR study. Each participant will be have fasting and oral glucose tolerance test data collected.
Other: Oral glucose tolerance test
For assessment of dysglycemia, 75 grams of glucose solution by mouth at 3 PEAR study visits for all enrolled participants: baseline, single drug therapy assessment, and dual drug therapy assessment.
Other Names:
  • OGTT
  • Glucose tolerance test
  • Glucola
  • Glucose tolerance diagnostic test
  • Sugar beverage

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
Number of Participants Diagnosed With Prediabetes or Normal Glucose, by 2 Measurements (Fasting Glucose Measurement and Glucose Measurement After a 2-hour Oral Glucose Tolerance Test [OGTT]), at Three Timepoints During Antihypertensive Treatment
Time Frame: Baseline, 9 weeks, and 18 weeks after initiation of PEAR intervention(s)
A single cohort of patients was followed through participation in the parent study, PEAR, and had both fasting and 2-hour OGTT labs evaluated at three time points. At each of these time points the two methods for evaluating prediabetes were compared. Consistent with the definition for prediabetes recommended by the American Diabetes Association, a fasting glucose above 99mg/dL or 2-hour oral glucose tolerance test glucose above 139mg/dL was considered prediabetic for this study.
Baseline, 9 weeks, and 18 weeks after initiation of PEAR intervention(s)

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.
University of Florida

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.

Helpful Links

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

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 1, 2009

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.
December 1, 2010

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.
December 1, 2010

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).
April 1, 2010

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.
April 6, 2010

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 7, 2010

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.
April 3, 2018

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.
March 30, 2018

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.
March 1, 2018

More Information

Terms related to this study

Keywords

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.
  • UFIRB2372009 - N
  • U01GM074492 (U.S. NIH Grant/Contract)

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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