Provision of UC
OSA
OSA diagnosis; the initiation of CPAP therapy, including mask fitting (day 0); and all follow-up care occurred at each sleep clinic following the usual procedures. A System One automatically adjusting CPAP device (Philips Respironics, Koninklijke Philips NV) was supplied to all the participants along with a modem for the remote monitoring of adherence, pressure delivery, and mask leak, which were accessed via the Philips Encore database. (At the time of the study, the Philips Respironics System One automatically adjusting CPAP device was a leading model in the Philips CPAP portfolio, and it was used by all the study participants. Since the time of the study, the model has been superseded by new models. At the time of the study, Philips Sleep in Respiratory Care [Respironics] was located at 1740 Golden Mile Hwy, Monroeville, PA 15146. In 2021, the company relocated to 6400 Penn Avenue, Pittsburgh, PA 15206). The device settings were determined by the referring physician.