Chest
Clinical InvestigationsSleep and BreathingLong-term Compliance Rates to Continuous Positive Airway Pressure in Obstructive Sleep Apnea: A Population-Based Study
Section snippets
General Program Description
This study was conducted at the University of Alberta Hospital (UAH) Sleep Disorders Laboratory, in Edmonton, AB, which is the only accredited sleep facility to conduct supervised polysomnography in Northern Alberta. Funding for the CPAP devices were provided by the Alberta Aids to Daily Living, a government agency that oversees the provision of Respiratory Health Services and respiratory equipment to the citizens of Alberta. Funding was also provided for hiring a dedicated CPAP clinic nurse
Study Cohort
During the study period, 1,007 patients underwent diagnostic polysomnography for a suspected sleep disorder. Of these, 296 patients (29.4%) had an AHI ≥20/h and were invited to join the CPAP program. No patients refused, and all were followed up for the duration of the study period. We did not lose any patients during follow-up. The baseline demographic and sleep study features for patients with and without OSA are shown in Table 1 . Patients with OSA were slightly older, more obese, and more
Discussion
This population-based CPAP program produced several interesting findings. First, we observed that > 92% of OSA patients in this program used CPAP for > 2.5 h/night on average for the first 6 months of the program. Even using a more stringent criterion for compliance (ie, ≥4 h of CPAP use per night), 84% of the eligible CPAP recipients were compliant with CPAP over the first 6 months of the program. Second, as expected, with the application of and compliance with CPAP therapy, there was a marked
ACKNOWLEDGMENT
The authors acknowledge the technical assistance of Rhoda Schreiner, Doreen Kelsey, and Doug Willms at the University of Alberta Hospital Sleep Disorders Laboratory; Dianne Chaba for preparation of the article; and Rod Rousseau from Alberta Aids to Daily Living Program, Alberta Health and Welfare.
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Dr. Sin is supported by a New Investigator Award from the Canadian Institutes of Health Research.