Effect of Weight Loss and CPAP on OSA and Metabolic Profile Stratified by Craniofacial Phenotype
Obstructive sleep apnea (OSA) is a common form of sleep-disordered breathing (SDB). Weight reduction has always been advocated in patients with OSA who are overweight and may lead to improvement in the severity of OSA. Previous study reported a randomized controlled trial of dietician-led lifestyle modification program (LMP) in 104 patients and found that LMP group had significantly more weight loss and reduced OSA severity, and the response was sustained after 8 months.
This study is aimed to compare the effect of weight loss or CPAP alone on subclinical inflammation, insulin resistance and blood pressure in patients with obesity and moderate-to-severe obstructive sleep apnea, stratified according to the degree of craniofacial restriction.
The study plans to recruit consecutive patients who have been referred to the Respiratory Clinic at the Prince of Wales Hospital with clinical suspicion of sleep-disordered breathing with specific study entry criteria including an age of 18 or more, body mass index (BMI) >25 kg/m2, and moderate to severe OSA diagnosed by home sleep study. Patients having conditions that will affect the serum level of hsCRP will be excluded.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Obstructive sleep apnea (OSA) is a common form of sleep-disordered breathing (SDB). It causes sleep fragmentation, disabling daytime sleepiness, impaired cognitive function, poor quality of life and cardiovascular diseases. Weight reduction has always been advocated in patients with OSA who are overweight and may lead to improvement in the severity of OSA. Previous study reported a randomized controlled trial of dietician-led lifestyle modification program (LMP) in 104 patients and found that LMP group had significantly more weight loss and reduced OSA severity, and the response was sustained after 8 months. However, a wide variety of response to the therapy was observed with 21.3% of patients with severe disease that converted to mild to moderate and only 6.6% of those with severe disease who became mild in severity. Apart from obesity, craniofacial factors are well recognized in the pathogenesis of OSA and are likely to play an important role in influencing the response to weight loss. For the same degree of OSA severity, Caucasians were more overweight whereas Chinese exhibited more craniofacial bony restriction. Recent studies showed that a smaller craniofacial skeleton is associated with better response from weight loss program in terms of OSA improvement. With vast majority of studies investigating the cardiometabolic changes after CPAP or weight loss on patients with OSA, evaluation based on craniofacial restriction, the key factor in the pathogenesis, is lacking.
This study aimed to compare the effect of weight loss or CPAP alone on subclinical inflammation, insulin resistance and blood pressure in patients with obesity and moderate-to-severe obstructive sleep apnea, stratified according to the degree of craniofacial restriction.
The study plans to recruit consecutive patients who have been referred to the Respiratory Clinic at the Prince of Wales Hospital with clinical suspicion of sleep-disordered breathing with specific study entry criteria including an age of 18 or more, body mass index (BMI) >25 kg/m2, and moderate to severe OSA diagnosed by home sleep study. Patients having conditions that will affect the serum level of hsCRP will be excluded.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Faktiske)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
-
Hong Kong, Hong Kong
- Chinese University of Hong
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Patients diagnosed with moderate or severe obstructive sleep apnea ( apnea hypopnea index (AHI) ≥ 15); body mass index ≥25 kg/m2; age 18-70 years.
Exclusion Criteria:
- Predominant central sleep apnea; conditions that will affect the level of hsCRP; unstable cardiovascular disease (e.g. recent unstable angina, myocardial infarction, stroke or transient ischemic attack within the previous 6 months or severe left ventricular failure; neuromuscular disease affecting or potentially affecting respiratory muscles; moderate to severe respiratory disease (i.e. breathlessness affecting activities of daily living) or documented hypoxemia or awake SaO2 <92%); psychiatric disease that limits the ability to give informed consent or complete the study.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Enkelt
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Aktiv komparator: Lifestyle modification program group
Patients with apnea-hypopnea index (AHI) ≥ 15/hr on home sleep study will participate in a dietitian-led lifestyle modification program (LMP) for 6 months.
Patients will attend dietary consultation weekly in the first 4 months, and then monthly in the following two months.
|
A caloric reduction of 10-20% in daily energy intake from the patient's usual diet (i.e. a deficit ≥ 200 calories per day) will be set as the general initial goal, which will be adjusted subsequently based on changes in body weight with target body mass index (BMI) towards 23 kg/m2.
|
|
Andet: CPAP group
Patients randomized into the continuous positive airway pressure (CPAP) group in each arm will be interviewed by the physician on duty and invited to start autoCPAP treatment for 6 months.
They will be offered a CPAP education package.
Patients will then commence autoCPAP treatment for 6 months at home.
|
Patients randomized into the continuous positive airway pressure (CPAP) group in each arm will be interviewed by the physician on duty and invited to start autoCPAP treatment for 6 months.
They will be offered a CPAP education package.
Patients will then commence autoCPAP treatment for 6 months at home.
|
Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Tidsramme |
|---|---|
|
changes in hsCRP
Tidsramme: 6 months
|
6 months
|
Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
change in Epworth Sleepiness Scale (ESS)
Tidsramme: 6 months
|
6 months
|
|
|
Change of insulin sensitivity by Matsuda index
Tidsramme: 6 months
|
6 months
|
|
|
Change of facial measurements on photography
Tidsramme: 6 months
|
Frontal and profile digital photographs of the head and neck are obtained with a standardized setup. A digital camera is mounted on a tripod at a distance of 160 cm from the subject alignment plane. Subjects are photographed standing upright while assuming the natural head position. Standardized methods are used to align subjects for the photographs. For the frontal photograph, the subject's facial landmark nasion is aligned along the subject alignment plane while ensuring both ears are seen equally from the front. For the profile photograph, the subject is instructed to turn 90 degrees to the left after the frontal photograph was taken. The subject's mid-sagittal plane is aligned to the subject alignment plane. Using image analysis software (Image J v1.36, NIH, Bethesda, MD), the photographs are examined for landmark digitization. |
6 months
|
|
Change of anatomic measurements of upper airway on computed tomography imaging
Tidsramme: 6 months
|
All subjects will perform a three-dimensional (3D) computed tomography (CT) scans of the head/neck region to evaluate the size of the maxillomandibular volume (MMV) based on the mandibular cephalometric landmarks (left and right condylion, left and right gonion, and menton).
All measurements will be made by a single assessor and the analysis will be performed blind to knowledge of AHI data.
|
6 months
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Susanna SS Ng, MBChB, Chinese University of Hong Kong
- Ledende efterforsker: Susanna Ng, MBChB, Chinese University of Hong Kong
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Faktiske)
Primær færdiggørelse
Studieafslutning (Faktiske)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- OSA-Craniofacial study
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .
Kliniske forsøg med Obstruktiv søvnapnø
-
NCT03323814AfsluttetSøvn, Slow-wave Sleep, Sleep Enhancement, Sleep Optimization
-
NCT06600633RekrutteringSøvnkvalitet | Sleep Onset Latency
-
NCT07409883Ikke rekrutterer endnuSøvninerti | Søvn, Slow-wave Sleep, Sleep Enhancement, Sleep Optimization | Natskiftarbejde
-
NCT07391852Ikke rekrutterer endnuSleep Onset Latency
-
NCT07069322Ikke rekrutterer endnuRichards-Campbell Sleep Questionnaire (RCSQ)
-
NCT05956392RekrutteringReduktion af skærmbrug + Sleep Extension | Frit levende
-
NCT06322524AfsluttetSøvnkvalitet | Søvnvarighed | Sleep Onset Latency
-
NCT07200167Ikke rekrutterer endnuSøvnkvalitet | Sleep Onset Latency
-
NCT07459322Ikke rekrutterer endnuSedation | DISE | OSAS (Obstructive Sleep Apneas Syndrome)
Kliniske forsøg med Lifestyle modification
-
NCT01503151Afsluttet
-
NCT06361095Rekruttering
-
NCT03176004Afsluttet
-
NCT02615717AfsluttetPost traumatisk stress syndrom
-
NCT02338453Afsluttet
-
NCT04365972Afsluttet
-
NCT01687764UkendtGeneraliseret angstlidelse | Social angst | Separationsangst
-
NCT01368302AfsluttetAttention Bias Modification Treatment (ABMT)