The document describes a study that aimed to identify typologies of CPAP adherence based on patients' beliefs and perceptions of their obstructive sleep apnea (OSA) diagnosis and treatment. The study used interviews of OSA patients before and after one week of CPAP treatment to identify differences in beliefs between adherent and nonadherent patients. The findings suggest that adherent patients were able to define health risks of OSA, had more facilitators than barriers to CPAP use, developed goals for treatment, and believed in their ability to use CPAP despite difficulties. Nonadherent patients were less able to define OSA risks, described barriers as more influential than facilitators, lacked clear goals, and had low self-efficacy