Skip to main content
. Author manuscript; available in PMC: 2020 Mar 1.
Published in final edited form as: Sleep Breath. 2018 Jun 22;23(1):193–200. doi: 10.1007/s11325-018-1680-0

Figure 1. Flow chart showing the cohort selection.

Figure 1

1. Of these 319 COPD patients started on PAP therapy, 292 (91.5%) patients had a visit for OSA during the same year.

Abbreviations: ICD-9 = International Classification of Diseases, Ninth revision; COPD = Chronic Obstructive Pulmonary Disease; PAP = Positive Airway Pressure; HMO = Health Maintenance Organization; CMS = Centers for Medicare and Medicaid Services.