Hypertension Clinical Trial
— CALIBREXOfficial title:
CAndesartan vs LIsinopril Effects on the BRain and Endothelial Function in eXecutive MCI (CALIBREX)
Verified date | February 2021 |
Source | Emory University |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Interventional |
The aim of this study is to conduct a 1-year double blind randomized control trial comparing candesartan to lisinopril in 140 individuals with hypertension and executive mild cognitive impairment in their effects on executive function, neuroimaging markers, and vascular indicators.
Status | Completed |
Enrollment | 176 |
Est. completion date | December 3, 2018 |
Est. primary completion date | December 3, 2018 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 55 Years and older |
Eligibility | Inclusion Criteria: 1. age: 55 years or older; 2. Hypertension: SBP=140 mm Hg or DBP= 90 mm or receiving antihypertensive medications. 3. Executive MCI will be defined using these criteria: 1. The Montreal Cognitive Assessment (MoCA) score less than or equal to 26 2. Executive dysfunction: A performance at the 10th percentile or below on at least one of four screening tests for executive function: Trail Making Test, Part B (TMT-B), modified Stroop interference, Digit Span and Digit Sequencing, and Letter fluency. 3. Minimal Functional limitation as reflected by the Functional Assessment Questionnaire (FAQ)=7 Exclusion Criteria: 1. Intolerance to study drugs; 2. SBP >200 or DBP >110 mm Hg; 3. Renal disease or hyperkalemia 4. Active medical or psychiatric problems 5. Uncontrolled congestive heart failure; 6. History of stroke in the past 3 years; 7. Inability to perform the study procedures 8. Women of childbearing potential 9. diagnosis of dementia 10. In those who lack decision capacity, a study surrogate who can sign on their behalf will be required. Since we are enrolling only those with MCI, we anticipate that most participants will have decision capacity 11. Current use of Lithium, as most antihypertensive classes may lead to increased lithium toxic levels. |
Country | Name | City | State |
---|---|---|---|
United States | Emory Univeristy | Atlanta | Georgia |
Lead Sponsor | Collaborator |
---|---|
Emory University | National Institute on Aging (NIA) |
United States,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Executive Function | Executive function will be assessed using Trail Making Test (part B-A). Part A was collected to correct for motor speed and visual-perceptual demands on TMT by subtracting completion time for TMT Part A from completion time for Part B (TMT B - A). TMT Part B-A provides a relatively purer measure of executive functioning. It has a timed scale from 0 sec (min) to 300 secs (max). Along this scale, a lower score is better. | 12 months | |
Primary | NINDS-initiated EXecutive Abilities: Measures and Instruments for Neurobehavioral Evaluation and Research or "EXAMINER" Tool Box. | EXecutive Abilities: Measures and Instruments for Neurobehavioral Evaluation and Research or "EXAMINER" tool box. This test batteryThe battery includes 11 tasks that generate 15 primary variables. Within this set, the EXAMINER includes: working memory, inhibition, set shifting, and fluency. The parts of EXAMINER that were used for this study include: Flanker task (inhibition) which involves responding to a central stimulus while ignoring flanking stimuli that are either compatible or incompatible with the central stimulus; Set-shifting, a measure of mental flexibility; Spatial 1-Back test assesses spatial working memory; Dot Counting test assesses verbal working memory; Verbal Fluency tested using a List Generation test which require the participant to generate words beginning with a specific letter, and category fluency in which the participant generates words from a specified category (e.g., animals, fruits). Higher are reflective of better executive function (-1 to +1) | 12 months | |
Secondary | Memory | To assess episodic memory, the Hopkins Verbal Learning Test-Revised (HVLT-R) will be used. The retention (%) score is calculated by dividing the delayed recall trial by the higher of 3 learning trials. Each trial scores 0 (min) to 12 (max). The HVLT-R retention score is a percentage, and a higher percentage represents a better outcome. | 12 months | |
Secondary | Language | This will be measured using the Boston Naming Test. BNT is a neuropsychological test used to assess visual confrontation naming and language performance in participants with cognitive decline. Its short 15-item version consists of drawings of objects ranging from common objects to less familiar objects. Scale: 0 (min score) to 15 (max score). For this test, a higher score/response represents a better outcome. | 12 months | |
Secondary | Attention Measured Using Digit Span Backward | The Digit Span test is a subtest of both the Wechsler Adult Intelligence Scale (WAIS) and the Wechsler Memory Scales (WMS). For the digit span backwards, subjects are read a sequence of numbers and asked to repeat the same sequence back to the examiner in reverse order (backward span). Backward span is an executive task particularly dependent on working memory. The Digit Span backward is scored for backwards performance. Scale: 0 (minimum) to 16 (maximum). A higher score represents a better outcome. | 12 months | |
Secondary | White Matter Lesion Volume | White Matter Lesion volume: high-resolution anatomical images are acquired for the measurement of microvascular disease. WMH volumes will be obtained from Fluid attenuated inversion recovery (FLAIR) imaging sequence and reported as total volume (in mm3). Higher values means greater WMH | 12 months | |
Secondary | Cerebral Perfusion | ASL-MRI: Arterial Spin Labeling (ASL) MRI is non-invasive measure of perfusion that does not require contrast, and allows multiple brain regions mapping of perfusion and reserve. ASL-MRI provides measures of cerebral blood flow (CBF). Higher values indicates higher CBF. | 12 months | |
Secondary | Attention Measured Using Digit Span Forward | This will be measured using Digit Span Forward. The Digit Span test is a subtest of both the Wechsler Adult Intelligence Scale (WAIS) and the Wechsler Memory Scales (WMS). For the digit span forward, subjects are read a sequence of numbers and asked to repeat the same sequence back to the examiner in the correct order (forward span). Forward span captures attention efficiency and capacity. The Digit Span forward is scored for forwards performance. Scale: 0 (minimum) to 16 (maximum). A higher score represents a better outcome. | 12 months |
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