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| ID | Type | Description | Link |
|---|---|---|---|
| U01GM074492 | U.S. NIH Grant/Contract | View source |
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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.
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).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| PEAR Participants | All participants eligible for PEAR study. Each participant will be have fasting and oral glucose tolerance test data collected. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Oral glucose tolerance test | Other | 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. |
| 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 | 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) |
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Inclusion Criteria:
participation in PEAR:
Exclusion Criteria:
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Primary care clinic, PEAR participants
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| Name | Affiliation | Role |
|---|---|---|
| Julie A Johnson, PharmD | University of Florida | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of Florida Department of Community Health and Family Medicine | Gainesville | Florida | 32610 | United States |
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| Label | URL |
|---|---|
| Pharmacogenomic Evaluation of Antihypertensive Responses (PEAR) ClinicalTrials website | View source |
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| ID | Title | Description |
|---|---|---|
| FG000 | PEAR Sub-study Participants | All participants eligible for the PEAR study in Gainesville, FL, starting May 2009, were allowed to participate in the PEAR sub-study; participants enrolled were evaluated at three time points as part of the PEAR protocol, at baseline, 9 weeks and 18 weeks; for each participant at each time point, a fasting glucose value and 2-hour oral glucose tolerance test value was collected and compared |
| Title | Milestones | Reasons Not Completed | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Study |
|
|
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| ID | Title | Description |
|---|---|---|
| BG000 | PEAR Sub-study Participants | All participants eligible for the PEAR study in Gainesville, FL, starting May 2009, were allowed to participate in the PEAR sub-study |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes |
|---|---|---|---|---|---|---|---|---|---|
| Age, Categorical | Count of Participants |
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | 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 | 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. | Only including participants with data at each time point | Posted | Number | participants | Baseline, 9 weeks, and 18 weeks after initiation of PEAR intervention(s) |
|
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | PEAR Sub-study Participants | All participants in the PEAR sub-study were evaluated by two methods at 3 time-points in the PEAR parent study |
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This was a pilot study to evaluate two glucose phenotypes in a small sample from a larger trial. As such, our sample size was small. Further, if participants were withdrawn from the parent trial, they were also withdrawn from the sub-study.
| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Mariellen Moore | University of Florida | 352-273-6381 | marielm@ufl.edu |
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| ID | Term |
|---|---|
| D011236 | Prediabetic State |
| D007333 | Insulin Resistance |
| D006973 | Hypertension |
| ID | Term |
|---|---|
| D003920 | Diabetes Mellitus |
| D044882 | Glucose Metabolism Disorders |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
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| ID | Term |
|---|---|
| D005951 | Glucose Tolerance Test |
| C007853 | Glucola |
| D000080845 | Sugar-Sweetened Beverages |
| ID | Term |
|---|---|
| D001774 | Blood Chemical Analysis |
| D019963 | Clinical Chemistry Tests |
| D019411 | Clinical Laboratory Techniques |
| D019937 | Diagnostic Techniques and Procedures |
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Serum and plasma
|
| Participants |
|
| Age, Continuous | Mean | Standard Deviation | years |
|
| Sex: Female, Male | Count of Participants | Participants |
|
| Region of Enrollment | Number | participants |
|
Glucose collected after a 2 hour oral glucose tolerance test
| OG001 | Fasting Glucose | Fasting glucose collected |
|
|
|
| 0 |
| 26 |
| 0 |
| 26 |
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| D004700 | Endocrine System Diseases |
| D006946 | Hyperinsulinism |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |
| D003933 | Diagnosis |
| D003940 | Diagnostic Techniques, Endocrine |
| D008919 | Investigative Techniques |
| D001628 | Beverages |
| D000066888 | Diet, Food, and Nutrition |
| D010829 | Physiological Phenomena |
| D019602 | Food and Beverages |