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Published ahead of print on October 4, 2002, doi:10.1164/rccm.200201-022OC
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American Journal of Respiratory and Critical Care Medicine Vol 167. pp. 20-23, (2003)
© 2003 American Thoracic Society

Original Article

Comparison between Automatic and Fixed Positive Airway Pressure Therapy in the Home

Clifford A. Massie, Nigel McArdle, Robert W. Hart, Wolfgang W. Schmidt-Nowara, Alan Lankford, David W. Hudgel, Nancy Gordon and Neil J. Douglas

Suburban Lung Associates, Elk Grove Village, Illinois; University Department of Medicine, University of Western Australia, Royal Perth Hospital, Perth, Australia; Sleep Medicine Associates of Texas, Dallas, Texas; Sleep Disorders Center of Georgia, Atlanta, Georgia; Case Western Reserve University, Cleveland, Ohio; Gordon and Associates, Berkeley, California; and Department of Medicine, Royal Infirmary, Edinburgh, United Kingdom

Correspondence and requests for reprints should be addressed to Clifford A. Massie, Ph.D., Suburban Lung Associates, 810 Biesterfield Rd., Suite 404, Elk Grove Village, IL 60007. E-mail: clifford.massie{at}sublung.com

We tested the hypothesis that continuous positive airway pressure (CPAP) use and outcomes can be improved by an autotitrating CPAP device in patients with obstructive sleep apnea–hypopnea syndrome (OSAHS) who require higher CPAP (10 cm H2O or more). In this multisite randomized single-blind cross-over study, 44 patients (mean age, 49 ± 10 years) were randomized to 6 weeks at laboratory-determined fixed pressure and 6 weeks on autotitrating CPAP. Average nightly use was greater in automatic mode (306 versus 271 minutes, p = 0.005); median and 95th centile pressures in automatic mode were lower (p < 0.002). Automatic CPAP resulted in better SF-36 Vitality scores (65 ± 20 versus 58 ± 23, p < 0.05) and mental health scores (80 ± 14 versus 75 ± 18, p < 0.05), but no significant difference in Epworth score (p = 0.065). During automatic therapy, patients reported more restful sleep, better quality sleep, less discomfort from pressure, and less trouble getting to sleep for both the first week of therapy and for the averaged scores for Weeks 2–6 (all p values < 0.006). Patients who require higher fixed CPAP use autotitrating CPAP more and report greater benefit from this therapy.

Key Words: adverse effects • compliance • continuous positive airway pressure • obstructive sleep apnea




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