Age-related Prevalence of Sleep Respiratory Disturbances

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. Identifier: NCT00005297
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : February 29, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To determine the prevalence and longitudinal course of sleep apnea among men and women and to examine the associations of apnea, oxygen desaturation, snoring, high blood pressure, and other biomedical correlates.

Condition or disease
Lung Diseases Heart Diseases Hypertension Sleep Apnea Syndromes

Detailed Description:


Sleep apnea is characterized by repetitive cessations of respiration during sleep with consequent decreases in arterial oxygen saturation. Sleep apnea can be caused by upper airway obstruction or by central nervous system failure to sufficiently excite the diaphragm and accessory respiratory muscles. However, in most cases, both processes are involved. Hypopneas, in which airflow is significantly compromised without complete cessations of respiratory flow, and snoring are often found in association with apneas. Both apneas and hypopneas cause repetitive disruptions of sleep, consequent daytime somnolence, and complex cardio-respiratory disturbances.


The study was longitudinal in design. A stratified random sample of adults in San Diego was used to examine risk factors in the prevalence of sleep respiratory disturbances. A structured random sample was selected by random digit telephone dialing. Subjects were studied in their homes. Some were followed yearly during the project. Each volunteer gave a brief sleep history and medical review, including blood pressure measurement, the National Interview Survey, And Quality of Well-being Scale. Blood oxygen saturation, pulse rate, snoring, and sleep duration were recorded for three nights. State-of-the-art computerized pulse oximeters and microprocessor-based activity/light monitors were used. Subjects found to have the most severe sleep respiratory disturbances underwent laboratory polysomnograms to add descriptive data and to validate the survey methodology. The prevalence of respiratory disturbances in sleep was analyzed as a function of age and sex. Associations with several aspects of morbidity were determined. The longitudinal course of respiratory disturbances in sleep were examined.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Study Type : Observational
Study Start Date : April 1990
Actual Study Completion Date : June 1997

Information from the National Library of Medicine

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Ages Eligible for Study:   up to 100 Years   (Child, Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
No eligibility criteria

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 identifier (NCT number): NCT00005297

Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
OverallOfficial: Daniel Kripke University of California, San Diego

Publications: Identifier: NCT00005297     History of Changes
Other Study ID Numbers: 2020
R01HL040930 ( U.S. NIH Grant/Contract )
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: February 29, 2016
Last Verified: March 2005

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