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Prevalence of OSAS in Chinese Elderly and Its CPAP Compliance

NCT02085720 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 819

Last updated 2016-05-05

Study results available
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Summary

Objective: Obstructive sleep apnoea syndrome (OSAS) is a common form of sleep-disordered breathing (SDB) causing sleep fragmentation, daytime sleepiness, cognitive function impairment, and poor health status in addition to increased risk of cardiovascular complications. OSAS is equally common among the middle-aged male Caucasian and Hong Kong (HK) Chinese populations with a prevalence of at least 4%. However, the prevalence of OSAS in the elderly population in Asia including HK is unknown.

Study Design: A sleep questionnaire will be conducted for 1000 subjects aged at least 60 yrs in the elderly community centers focusing on symptoms of OSAS, subjective sleepiness, restless leg syndrome, and sleep-related habits and routines, in addition to past medical history and medications. Home sleep study (EMBLETTA) capable of recording sleep (a single EEG channel), respiratory events, snoring, respiratory efforts and oximetry will be performed on 300 subjects randomly. Those who have negative or technical inadequate EMBLETTA study with a high pre-test probability of moderate to severe OSA will be invited to undergo hospital-based polysomnography for confirmation of their sleep apnoea status. Subjects with AHI\>15/hr regardless of symptoms or those with AHI 5-15/hr plus comorbid conditions or excessive daytime sleepiness will be offered continuous positive airway pressure (CPAP) titration followed by CPAP treatment, with serial assessment of subjective sleepiness, quality of life, and cognitive function.

Outcome measures: the prevalence rates of SDB (AHI\>10, \>15 and \>30/hr), OSAS, and other sleep disturbances, such as restless leg syndrome (RLS). In addition, we will examine the factors which are predictive of the presence of SDB in this population, and assess the CPAP acceptance, compliance, and treatment outcome of those with OSAS.

Conditions

  • Obstructive Sleep Apnea Syndrome
  • Restless Leg Syndrome

Interventions

DEVICE

CPAP therapy

As OSA may increase the risk of cardiovascular mortality, all elderly subjects with AHI ≥ 15 or those with AHI ≥ 5 plus either cardiovascular risk factors or ESS score ≥ 10 received patient education program. Elderly subjects who agree for home CPAP treatment were prescribed nasal CPAP units with time clocks to assess objective compliance (run time). ESS, sleep apnea specific quality of life index (SAQLI), and cognitive function tests were performed at baseline, 3 months, 6 months and 12 months after CPAP treatment.

Sponsors & Collaborators

  • Chinese University of Hong Kong

    lead OTHER

Principal Investigators

  • Susanna SS Ng, MBChB · Chinese University of Hong Kong

Study Design

Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Min Age
60 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2007-09-30
Primary Completion
2010-08-31
Completion
2011-08-31

Countries

  • Hong Kong

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02085720 on ClinicalTrials.gov