Clinical trial NCT05125224: Data Analysis for Drug Repurposing for Effective Alzheimer's Medicines (DREAM)- Dihydropyridine Calcium Channel Blockers Versus Hydrochlorothiazide
Official title: Data Analysis for Drug Repurposing for Effective Alzheimer's Medicines (DREAM)- Dihydropyridine Calcium Channel Blockers Versus Hydrochlorothiazide
Study type: OBSERVATIONAL
Overall status: ACTIVE_NOT_RECRUITING
Conditions: Hypertension
Lead sponsor: Brigham and Women's Hospital
Sponsor class: OTHER
Collaborators: name: National Institute on Aging (NIA)
name: Rutgers University
name: Johns Hopkins University
First posted: 2021-11-18
Enrollment: 163720
Sex: ALL
Minimum age (years): 65
Standard ages: OLDER_ADULT
Observational model: COHORT
Time perspective: RETROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: This study will employ a new user, active comparator, observational cohort study design comparing dihydropyridine CCBs to hydrochlorothiazide. The patients will be required to have continuous enrollment during the baseline period of 365 days before initiation of dihydropyridine CCBs or hydrochlorothiazide (index date). Follow-up for the outcome (dementia) differs between analyses. Follow-up begins the day after drug initiation (analysis 1, 3, 4); 180 days after drug initiation (analysis 2).

Brief summary: This study aims to evaluate the comparative risk of dementia/Alzheimer's disease onset between patients treated with medications that target specific metabolic pathways and patients treated with alternative medications for the same indication.

Detailed description: This is a non-randomized, non-interventional study that is part of the DREAM Study of Brigham and Women's Hospital. DREAM is led by Dr. Madhav Thambisetty, MD, PhD, Chief of the Clinical and Translational Neuroscience Section, Laboratory of Behavioral Neuroscience, National Institute on Aging (NIA) intramural research program. This study aims to evaluate the comparative risk of dementia/Alzheimer's disease onset between patients treated with medications that target specific metabolic pathways and patients treated with alternative medications for the same indication using healthcare claims data.

Eligibility criteria: Please see https://docs.google.com/spreadsheets/d/1VlyY3zcxoRp0tH7yv8rSOEggSO6WQ0VYEjq-6KlSSt8/edit?usp=sharing or Appendix A for full code and algorithm definitions.

Medicare timeframe: 2008 to 2018 (end of data availability).

Inclusion Criteria:

* 1. Aged \> 65 years on the index date
* 2. Enrollment in Medicare Part A, B, and D with no HMO coverage for 365 days prior to and including cohort entry date
* 3. At least two claims with hypertension diagnosis recorded in 365 days prior to cohort entry date

Exclusion Criteria:

* 1. Prior history of dementia measured anytime prior to cohort entry date
* 2. Prior use of dihydropyridine CCBs, hydrochlorothiazide, or other antihypertensives anytime prior to cohort entry date

Primary outcomes:
measure: Time to dementia onset
timeFrame: Through study completion (a median of 238 days)
Secondary outcomes:
measure: Time to Alzheimer's disease onset
timeFrame: Through study completion (a median of 238 days)
Other outcomes:
Locations:
city: Boston
country: United States
facility: Brigham and Women's Hospital
state: Massachusetts
Study officials:
affiliation: National Institute on Aging (NIA)
name: Madhav Thambisetty, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References: