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Comparison Between Auto CPAP and Fixed CPAP in Chinese Patients With OSA

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: March 28, 2006
Last Update Posted: March 28, 2006
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by:
Chinese University of Hong Kong
AutoCPAP would lead to better compliance than FixCPAP

Condition Intervention
Obstructive Sleep Apnea Device: AutoCPAP Device: FixCPAP

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Official Title: Comparison of Auto-Continuous Positive Airway Pressure Device(Auto-CPAP) With Conventional Fixed CPAP in Chinese Patients With Obstructive Sleep Apnea (OSA)

Resource links provided by NLM:

Further study details as provided by Chinese University of Hong Kong:

Primary Outcome Measures:
  • To compare the compliance of auto-CPAP and fixed CPAP in terms of CPAP usage hours.
  • To compare the clinical efficacy of auto-CPAP and fixed CPAP in terms of pressure level to abolish OSA, Epworth sleepiness scale and quality of life questionnaire.
  • To compare patient acceptance of the different type of treatment.

Study Start Date: August 2004
Estimated Study Completion Date: June 2005
Detailed Description:

A prospective, randomized crossover cohort. Study subjects consisted of patients newly diagnosed with obstructive sleep apnea (OSA) confirmed with sleep study. All are CPAP naïve.


Arm 1: auto CPAP sleep study then auto CPAP for 2 months Arm 2: fixed CPAP titration then fixed CPAP for 2 months

Then switch over to the other arm

Trial end after 4 months, compliance and other parameters would be compared between two arms as described in the endpoint session.


Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • All subjects should be CPAP naïve.
  • OSA confirmed with sleep study
  • Presence of daytime symptoms with excessive daytime sleepiness
  • Age between 18 to 65
  • RDI greater than 30
  • Agreed to participate in trial with informed consent signed

Exclusion Criteria:

  • Patients not suitable to nasal CPAP because of facial abnormality leading to poor mask fitting.
  • Patients with known COPD with type II failure
  • Patients with known heart failure.
  • Patients with predominant central sleep apnea.
  • Patients need bilevel positive airway pressure ventilation.
  • Patients refusing to participate the trial.
  • Patients have difficulty to follow up regularly.
  • patients with untreated or under treatment of hypothyroidism
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00307424

North District Hospital
Hong Kong, China
Prince of Wales Hospital
Hong Kong, China
Sponsors and Collaborators
Chinese University of Hong Kong
Principal Investigator: To K Wang, FHKCP Prince of Wales Hosptial
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
ClinicalTrials.gov Identifier: NCT00307424     History of Changes
Other Study ID Numbers: CRE-2004.258-T
First Submitted: March 27, 2006
First Posted: March 28, 2006
Last Update Posted: March 28, 2006
Last Verified: August 2004

Additional relevant MeSH terms:
Sleep Apnea Syndromes
Sleep Apnea, Obstructive
Respiration Disorders
Respiratory Tract Diseases
Sleep Disorders, Intrinsic
Sleep Wake Disorders
Nervous System Diseases