Patients will be contacted by the homecare provider after 2 days and will be asked about progress and compliance as well as about any problems. The PAP coordinator at the homecare provider will review the downloaded information every morning except on weekends and holidays and will contact the patient if any of the following occur: mask leakage of the 95 percentile > 24 L/min, < 4 h of use for two consecutive nights, AHI > 10 events/h, and 90th percentile of pressure > 16 cm H2O. The homecare provider will call the patient or his/her relatives and will ask about symptoms such as dry mouth, mask issues, discomfort with the device, or any other problems. If the only issue is low adherence due to lack of motivation, the homecare provider will encourage the patient to use PAP. Should there be any other problems, the homecare provider will discuss the case with the PAP coordinator (the same person that sees the patients in the standard arm) and arrange for the patient to talk to or see the PAP coordinator, depending on the patient's responses and the physiological data obtained. Specific interventions may be performed to improve compliance that are considered standard at the hospital (e.g., different mask, chin strap, modifications of pressure settings, modifications of humidifier settings, saline nasal sprays).