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Hypertension,EssentialCRESCENTNCT04119999

A Cardiosleep Research Program on Obstructive Sleep Apnea, Blood Pressure Control and Maladaptive Myocardial Remodeling

A study testing Mandibular Advancement Device and Continuous Positive Airway Pressure in people with Hypertension,Essential and Obstructive Sleep Apnea, run by National University of Singapore at 1 site in Singapore.

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

The objective of this proposal is to evaluate whether mandibular advancement device (MAD) is non-inferior to continuous positive airway pressure (CPAP) in the treatment of obstructive sleep apnea (OSA) and blood pressure reduction. OSA and hypertension are highly prevalent disorders with profound impacts on health. Read more about this study

Who is it for?
Ages 40 years and older
What is being tested?
Mandibular Advancement Device and Continuous Positive Airway Pressure
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
321 participants
Where
1 siteSingapore
Study dates
16 Oct 2019to 15 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 40 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age of at least 40 years
  • Chinese (based on the Identity Card or other Identity Document if the subject is a non-Singapore citizen or permanent resident)
  • Physician diagnosed essential hypertension, on at least 1 medication for BP control
  • High cardiovascular risk, as defined by one or more of the following: (a) diabetes mellitus, (b) stroke, (c) significant coronary artery disease (at least one stenosis of >50% diameter in at least one major epicardial artery), (d) chronic kidney disease, excluding polycystic kidney disease, with an estimated glomerular filtration rate of <60 ml/min/1.73m2, or (e) age of 75 years or older.

Who cannot join

  • Known OSA on treatment
  • Cheyne-Stokes breathing or predominantly central sleep apnea (>50%)
  • Known secondary hypertension: from renal (renal artery stenosis, chronic renal failure); endocrine (aldosterone excess, pheochromocytoma, cushing's syndrome, hyperthyroidism) or cardiac causes (aortic coarctation)
  • Contraindications to CMR: implantable devices, cerebral aneurysm clips, cochlear implants, renal impairment (GRF <30ml/min/1.73m2), claustrophobia and pregnant women
  • Contraindications to MAD: <6 to 10 teeth in each arch, inability to advance the mandible and open the jaw widely, pre-existing temporomandibular joint problems, severe bruxism
  • Limited life expectancy (< 1 year)
  • Hypertensive crisis, acute coronary syndromes or acute heart failure in the past 30 days
  • Known AF (not suitable for CMR and affects remodelling analysis)

Trial locations and contacts

1 site in 1 country.

Singapore1 site
  • NUHS Cardiosleep research laboratory

    Singapore

Other trials in Singapore

About this study

The objective of this proposal is to evaluate whether mandibular advancement device (MAD) is non-inferior to continuous positive airway pressure (CPAP) in the treatment of obstructive sleep apnea (OSA) and blood pressure reduction. OSA and hypertension are highly prevalent disorders with profound impacts on health. Apart from improving quality of-life, an effective OSA treatment could improve cardiovascular risk partly through blood pressure reduction, particularly in patients with high cardiovascular risk in whom blood pressure control is often suboptimal. Although CPAP is useful, the high non-acceptance and non-adherence preclude its widespread use.

East Asians have a restrictive craniofacial phenotype that predisposes them to OSA and the associated cardiovascular stress. CPAP, while considered the first-line therapy for OSA, has failed to improve cardiovascular outcomes in randomized trials till date because it is poorly tolerated. MADs are oral appliances that correct the restrictive craniofacial phenotype present in East Asians by protruding the lower jaw to reduce upper airway collapsibility. MADs are better tolerated than CPAP, and this may be an important determinant of the overall effectiveness in treating OSA, and thus ameliorating the downstream adverse health outcomes. We hypothesize that MADs are non-inferior to CPAP in treating OSA and reducing cardiovascular risk by blood pressure reduction in East Asians.

We will recruit East Asian subjects with hypertension and high cardiovascular risk for polysomnography. Patients diagnosed with OSA (n=220) will be randomized to MAD or CPAP groups in a 1:1 ratio for a treatment duration of 6 months. The primary endpoint is the 24-hour mean blood pressure as determined by ambulatory monitoring. The secondary endpoints include sleep-time systolic BP, target blood pressure, cardiovascular biomarkers, and myocardial remodeling. Association between OSA and silent paroxysmal atrial fibrillation will also be determined. If MADs are shown to be effective, the next step is to evaluate our novel device- drug-eluting MAD that the team is developing.

Being tested
Mandibular Advancement Device, Continuous Positive Airway Pressure
Keywords
sleep, remodeling, blood pressure, trial
Medical subject headings
Essential Hypertension, Sleep Apnea, Obstructive

What participants receive

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

  • Mandibular Advancement DeviceDevice

    Mandibular advancement device (MAD) has been a novel method in the management of snoring and OSA. For mild to moderate sleep apnea, MADs have been a boon. A guideline published by American Academy of Sleep Medicine stated that MAD was indicated as first-line therapy for mild OSA and a second-line therapy for moderate to severe OSA

  • Continuous Positive Airway PressureDevice

    Continuous positive airway pressure (CPAP) is a form of positive airway pressure ventilator, which applies mild air pressure on a continuous basis to keep the airways continuously open in people with OSA

Study groups in NCT04119999
Study groupRoleWhat they receive
CPAPActive comparatorContinuous Positive Airway Pressure
Receives: Device: Continuous Positive Airway Pressure
MADExperimentalMandibular Advancement Device
Receives: Device: Mandibular Advancement Device

What is being measured

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

  1. 24-hour mean BP (24MBP)

    Difference in 24-hour mean BP (24MBP) between the patients in the MAD and CPAP groups as determined by 24-hour ambulatory BP monitoring.

    Measured: 6 months

Secondary outcomes (17)
  1. 24-hour systolic BP (24SBP)

    Difference in 24-hour systolic BP (24SBP) between the patients in the MAD and CPAP groups as determined by 24-hour ambulatory BP monitoring.

    Measured: 6 months and 12 months

  2. 24-hour pulse pressure (24PP)

    Difference in 24-hour pulse pressure (24PP) between the patients in the MAD and CPAP groups as determined by 24-hour ambulatory BP monitoring.

    Measured: 6 months and 12 months

  3. Nocturnal dipping

    Difference in prevalence of nocturnal dipping between the patients in the MAD and CPAP groups as determined by 24-hour ambulatory BP monitoring.

    Measured: 6 months and 12 months

  4. Ectopic beat

    Difference in prevalence of ectopic beats between the patients in the MAD and CPAP groups as determined by continuous ECG monitoring

    Measured: 12 months

  5. Myocardial remodeling

    Difference in LV and LA dimensions between the patients in the MAD and CPAP groups as determined by cardiac MRI

    Measured: 12 months

  6. Epworth Sleepiness Scale (ESS) score

    Difference in change in ESS score between the MAD and CPAP groups

    Measured: 6 months and 12 months

  7. Sleep Apnea Quality of Life Index (SAQLI)

    Difference in change in SAQLI score between the MAD and CPAP groups

    Measured: 6 months and 12 months

  8. Functional Outcome of Sleep Questionnaire (FOSQ)

    Difference in change in SAQLI score between the MAD and CPAP groups

    Measured: 6 months and 12 months

  9. 36-Item Short Form Health Survey (SF-36)

    Difference in change in SF-36 score between the MAD and CPAP groups

    Measured: 6 months and 12 months

  10. EuroQol 5Q (EQ5D)

    Difference in change in EQ5D score between the MAD and CPAP groups

    Measured: 6 months and 12 months

  11. Daytime systolic BP

    Difference in change in daytime systolic BP between the patients in the MAD and CPAP

    Measured: 6 months and 12 months

  12. Nighttime systolic BP

    Difference in change in nighttime systolic BP between the patients in the MAD and CPAP

    Measured: 6 months and 12 months

  13. Percentage of patient with 24-hour systolic BP<130 mmHg

    Difference in percentage of patients with 24-hour systolic BP<130 mmHg in the MAD and CPAP groups

    Measured: 6 months and 12 months

  14. Percentage of patient with 24-hour systolic BP<120 mmHg

    Difference in percentage of patients with 24-hour systolic BP<120 mmHg in the MAD and CPAP groups

    Measured: 6 months and 12 months

  15. NT-proBNP

    Change in the plasma level of NT-proBNP from baseline to 6-month follow-up

    Measured: 6 months and 12 months

  16. High sensitivity troponin

    Change in the plasma level of high sensitivity troponin from baseline to 6-month follow-up

    Measured: 6 months and 12 months

  17. High sensitive C-reactive protein

    Change in the plasma level of high sensitive C-reactive protein from baseline to 6-month follow-up

    Measured: 6 months and 12 months

Timeline

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

  1. First posted9 Oct 2019
  2. Study start16 Oct 2019
  3. Primary completion31 Aug 2023
  4. Study completion15 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
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
321 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04119999
Sponsor's protocol ID
Senior CSA
Acronym
CRESCENT
Status last verified
Feb 2024
First submitted
7 Oct 2019
Last updated
20 Feb 2024
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided: The individual participant data generated by the CRESCENT trial will be made available as soon as possible upon reasonable request, wherever legally and ethically possible.

Publications

  • Ou YH, Colpani JT, Cheong CS, Loke W, Thant AT, Shih EC, Lee F, Chan SP, Sia CH, Koo CY, Teo YH, Chan J, Wong S, Chua A, Khoo CM, Kong WK, Chin CW, Kojodjojo P, Wong PE, Hausenloy D, Chan MY, Richards AM, Cistulli PA, Lee CH. Treatment of OSA using mandibular advancement versus CPAP in improving cardiovascular health. Am J Med. 2026 Apr 19:S0002-9343(26)00293-7. doi: 10.1016/j.amjmed.2026.04.008. Online ahead of print.

    PubMed 42013991
  • Colpani JT, Ou YH, Kosasih AM, Lee FKF, Chan SP, Tan HH, Wong RCW, Chin CW, Cistulli PA, Lee CH. Mandibular Advancement Device versus CPAP in Severe Obstructive Sleep Apnea. J Dent Res. 2026 Jan;105(1):112-119. doi: 10.1177/00220345251361796. Epub 2025 Sep 1.

    PubMed 40888163
  • Colpani JT, Ou YH, Thakumar AV, Cheong CS, Loke W, Sia CH, Teo YH, Chan SP, Chin CW, Kojodjojo P, Chan MY, Cistulli PA, Luo N, Lee CH. Patient-reported quality of life outcomes with mandibular advancement versus continuous positive airway pressure: insights from the CRESCENT trial. Sleep. 2025 Nov 10;48(11):zsaf022. doi: 10.1093/sleep/zsaf022.

    PubMed 39887015
  • Ou YH, Colpani JT, Cheong CS, Loke W, Thant AT, Shih EC, Lee F, Chan SP, Sia CH, Koo CY, Wong S, Chua A, Khoo CM, Kong W, Chin CW, Kojodjojo P, Wong PE, Chan MY, Richards AM, Cistulli PA, Lee CH. Mandibular Advancement vs CPAP for Blood Pressure Reduction in Patients With Obstructive Sleep Apnea. J Am Coll Cardiol. 2024 May 7;83(18):1760-1772. doi: 10.1016/j.jacc.2024.03.359. Epub 2024 Apr 6.

    PubMed 38588926
  • Ou YH, Colpani JT, Chan SP, Loke W, Cheong CS, Kong W, Chin CW, Kojodjojo P, Wong P, Cistulli P, Lee CH. Mandibular advancement device versus CPAP in lowering 24-hour blood pressure in patients with obstructive sleep apnoea and hypertension: the CRESCENT trial protocol. BMJ Open. 2023 May 31;13(5):e072853. doi: 10.1136/bmjopen-2023-072853.

    PubMed 37258080

Questions about this trial

What is this clinical trial studying?

A study testing Mandibular Advancement Device and Continuous Positive Airway Pressure in people with Hypertension,Essential and Obstructive Sleep Apnea, run by National University of Singapore at 1 site in Singapore.

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 4 inclusion and 8 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 20 Feb 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 Singapore. 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?

24-hour mean BP (24MBP) (time frame: 6 months). 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 NCT04119999, which also lists 5 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 20 Feb 2024.

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