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HypertensionNCT04054648

BedMed-Frail: Does the Potential Benefit of Bedtime Antihypertensive Prescribing Extend to Frail Populations?

A study testing Bedtime administration of the participant's pre-existing antihypertensive medications in people with Hypertension and Dementia, run by University of Alberta at 1 site in Canada.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

High blood pressure (present in 1 of 5 Canadian adults) increases the risk of heart attack and stroke. Blood pressure lowering pills reduce this risk - but perhaps not optimally. Read more about this study

Who is it for?
Any age
Conditions the study is for
Hypertension, Dementia
What is being tested?
Bedtime administration of the participant's pre-existing antihypertensive medications
Could I receive a placebo?
No, everyone receives an active treatment
How many people
776 participants
Where
1 siteCanada
Study dates
25 May 2020to 29 Feb 2024
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages Any age
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Hypertension diagnosis as indicated by ≥ 2 such billing diagnoses at any time in the administrative claims data by any provider
  • ≥ 1 once daily BP lowering medication
  • Resident in a participating long term care facility.

Who cannot join

  • Personal history of glaucoma or use of glaucoma medications. Glaucoma is an exclusion because nocturnal hypotension (i.e. excessively low blood pressure while sleeping) has been associated with ischemic optic neuropathy in such patients.
  • Any patient / family member or treating physician (all of whom will be notified in advance of the LTC facilities participation in this initiative) requesting the patient not participate.

Trial locations and contacts

1 site in 1 country.

Canada1 site
  • Multiple Alberta Long Term Care Facilities

    Edmonton, Alberta

Other trials in Canada

About this study

Official title: Does the Potential Benefit of Bedtime Antihypertensive Prescribing Extend to Frail Populations? The "BedMed-Frail" Randomized Controlled Trial

High blood pressure (present in 1 of 5 Canadian adults) increases the risk of heart attack and stroke. Blood pressure lowering pills reduce this risk - but perhaps not optimally. A Spanish study suggests that using blood pressure pills at bedtime, instead of in the morning (when they are most commonly used), reduces death, heart attack, and stroke by more than 50%. If true, a switch to bedtime prescribing would have more impact on the health of those with high blood pressure than whether high blood pressure is treated at all.

BedMed, a community-based Canadian primary care trial, is already running and looking both to validate the findings of this Spanish study and to determine whether there might be unrecognized harms of bedtime use (such as more falls and fractures as a result of lower overnight blood pressure). One very important population that is likely to be more sensitive to the effects of medications, and almost always excluded from randomized trials, are the frail elderly (such as those who are resident in nursing homes). In order to have the greatest information about the safety and effectiveness of bedtime blood pressure medications, the BedMed team is additionally conducting a similar trial to BedMed in nursing homes ("BedMed-Frail" - the subject of this trial registration) to determine whether the risks and benefits of bedtime prescribing differ in this highly understudied population.

Basics of the trial: When patients are admitted to nursing homes, neither they nor their physicians are consulted about the timing of blood pressure medication. Unless explicitly stated to be otherwise, blood pressure pills are instead largely arbitrarily assigned for morning use by default. Given there is evidence that bedtime administration may be safer, the nursing homes participating in BedMed-Frail will have each hypertensive resident randomized to either continue with morning blood pressure medication use, as is their norm, or to have their facility's pharmacist gradually switch each residents blood pressure pills to bedtime. Over a period of roughly 3 years, health outcomes in these facilities will be tracked using routinely collected electronic health data to determine differences in things like hospitalization, death, or hip fractures - and at the end of the study the investigators hope to determine whether or not the recommendations for blood pressure medication timing in frail older adults should differ from those for the general population.

Read the detailed description

The BedMed trial (led out of the University of Alberta and funded by both Alberta Innovates Health Solutions, and the Canadian Institutes for Health Research) is a pragmatic multi-provincial trial intended to determine whether bedtime antihypertensive use, as compared to conventional morning use, reduces major adverse cardiovascular events in community dwelling primary care patients.

BedMed-Frail, led by the same group of investigators, is a complementary but separate randomized trial evaluating whether the risks and benefits of bedtime antihypertensive use differ in a long-term care (LTC) population. To accomplish this, within participating Alberta LTC and supportive living facilities, eligible residents with hypertension will be randomized at the patient level to the antihypertensive medication timing intervention (i.e. bedtime versus continued morning use). Trial outcomes and baseline characteristics are drawn from routinely collected electronic health data - using both provincial administrative health claims data and the Resident Assessment Instrument Minimum Data Set (RAI-MDS), which is a standard instrument for collecting clinical information in Canadian LTC facilities.

BedMed-Frail is event driven, receiving quarterly reporting of total events from the Alberta Support for Patient Oriented Research (SPOR) Unit's Data Platform. Funding permitting, the trial will continue until observation of 368 primary outcome events. Upon observation of half that number, an independent data safety monitoring board (IDSMB) chaired by Dr. James Wright (Cochrane Hypertension Review Group Co-ordinating Editor) will examine all available outcomes. If p is ≤ 0.001 for benefit (the Haybittle-Peto boundary - recommended to reduce the chance of stopping too early and magnifying benefit), or if p is ≤ 0.05 for harm, the IDSMB will apply clinical judgement and make recommendations to the steering committee on whether the trial should break early.

The outcomes of BedMed-Frail are primarily designed to be analogous to the cardiovascular and safety outcomes monitored for in the community BedMed study. However BedMed-Frail is also examining for differences in behaviour issues between groups. Both behavioural problems, and blood pressure, have circadian rhythms. Blood pressure is normally lower overnight and behavioural problems in long term care residents typically worsen during the same period - a phenomenon known as "sundowning". Conceivably, there could be a relationship between the two such that behaviour problems might improve, or worsen, with bedtime antihypertensive use.

Being tested
Bedtime administration of the participant's pre-existing antihypertensive medications
Keywords
Pragmatic, Primary Care, Chronotherapy, Administrative Data, Behaviourism, Sundowning, Stroke, Myocardial Infarction, Heart Failure, Hip Fracture, Nursing Home, Long Term Care
Medical subject headings
Hypertension, Dementia, Stroke, Myocardial Infarction, Heart Failure, Hip Fractures

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Bedtime administration of the participant's pre-existing antihypertensive medicationsOther

    Changing the administration time of once daily blood pressure lowering medications, one at a time as tolerated, from morning to bedtime.

Study groups in NCT04054648
Study groupRoleWhat they receive
Bedtime Antihypertensive MedicationsActive comparatorThe LTC facility's pharmacist will switch all once daily antihypertensive medications, one at a time as tolerated, to bedtime. Blood pressure lowering medications taken more than once per day are left alone.
Receives: Other: Bedtime administration of the participant's pre-existing antihypertensive medications
Morning Antihypertensive MedicationsNo interventionNo change to blood pressure medication timing is made. By default, most patients are using once daily antihypertensive medications in the morning at baseline.

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Composite of Major Adverse Cardiovascular Events

    Composite of all-cause death and hospital admission or emergency room visit for acute coronary syndrome / myocardial infarction, heart failure, or stroke - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

Secondary outcomes (12)
  1. All Cause Mortality

    All cause death - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  2. Hospitalization for Acute Coronary Syndrome / Myocardial Infarction

    Hospitalization or emergency room visit for acute coronary syndrome / myocardial infarction - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  3. Hospitalization for Stroke

    Hospitalization or emergency room visit for stroke - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  4. Hospitalization for Congestive Heart Failure

    Hospitalization or emergency room visit for congestive heart failure - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  5. All Cause Unplanned Hospitalization

    All cause hospitalization or emergency room visit excluding elective surgeries or booked procedures / planned follow-up care - as recorded in governmental health claims databases

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  6. Non-vertebral Fracture

    Any physician billing (hospital or community) for a fracture other than a vertebral fracture (which might indicate a vertebral compression fracture secondary to osteoporosis, and not trauma)

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  7. Number of Patients with a Fall in the Last 30 days

    As recorded in the first quarterly Minimum Data Set (MDS) report recorded at the care facility in the 3 to 6 month window following randomization

    Measured: 4.5 Months (Average - will occur within a 3 to 6 month post randomization window)

  8. Number of Patients with "Deteriorated Cognition Relative to Status 90 Days Prior"

    As recorded in the first quarterly Minimum Data Set (MDS) report recorded at the care facility in the 3 to 6 month window following randomization

    Measured: 4.5 Months (Average - will occur within a 3 to 6 month post randomization window)

  9. Number of Patients with Urinary Incontinence

    As recorded in the first quarterly Minimum Data Set (MDS) report recorded at the care facility in the 3 to 6 month window following randomization. Includes "occasionally incontinent" or more frequent, which equates to 2 or more episodes per week.

    Measured: 4.5 Months (Average - will occur within a 3 to 6 month post randomization window)

  10. Number of Patients with Partial or Full Thickness Decubitus Skin Ulceration ("Bed Sores")

    As recorded in the first quarterly Minimum Data Set (MDS) report recorded at the care facility in the 3 to 6 month window following randomization. Requires some degree of skin breakdown and not just erythema (i.e. stages 2 to 4).

    Measured: 4.5 Months (Average - will occur within a 3 to 6 month post randomization window)

  11. Acute Care Costs

    Calculated from all hospitalizations using the resource intensity weight (RIW) and length of stay (LOS) as recorded in governmental health claims data

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

  12. Total Cost of Care

    Acute care costs + medication costs + physician billings + nursing / facility costs as recorded in governmental health claims data. Nursing / facility costs will be estimated from level of care and duration of stay

    Measured: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted13 Aug 2019
  2. Study start25 May 2020
  3. Primary completion29 Feb 2024
  4. Study completion29 Feb 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Parallel groups
Model description
Event-driven Prospective Randomized Open Blinded End-Point (PROBE) Randomized Trial.
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
776 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04054648
Sponsor's protocol ID
Pro00086129
Status last verified
Aug 2024
First submitted
29 Jul 2019
Last updated
27 Aug 2024
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: Although we hope to make a de-identified participant-level version of our final analytic dataset publicly available on our website (www.PragmaticTrials.ca), and will request to do so, this requires the permission of Alberta Health Services, who must weigh the privacy concerns.

Publications

  • Garrison SR, Youngson ERE, Perry DA, Campbell FN, Korownyk CS, Green LA, Kolber MR, Kirkwood JEM, Allan GM, Kraut RY, McAlister FA, Hill MD, Bakal JA. Bedtime vs Morning Antihypertensive Medications in Frail Older Adults: The BedMed-Frail Randomized Clinical Trial. JAMA Netw Open. 2025 May 1;8(5):e2513812. doi: 10.1001/jamanetworkopen.2025.13812.

    PubMed 40354050
  • Garrison SR, Youngson E, Perry DA, Campbell FN, Kolber MR, Korownyk C, Allan GM, Green L, Bakal J. Bedtime versus morning use of antihypertensives in frail continuing care residents (BedMed-Frail): protocol for a prospective, randomised, open-label, blinded end-point pragmatic trial. BMJ Open. 2023 Aug 1;13(8):e074777. doi: 10.1136/bmjopen-2023-074777.

    PubMed 37527898

Questions about this trial

What is this clinical trial studying?

A study testing Bedtime administration of the participant's pre-existing antihypertensive medications in people with Hypertension and Dementia, run by University of Alberta at 1 site in Canada.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 27 Aug 2024. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Canada. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Composite of Major Adverse Cardiovascular Events (time frame: 3 years (Estimate Only - study continues until 368 participants have experienced primary outcome events)). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04054648, which also lists 2 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Aug 2024.

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