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To determine long-term compliance rates to continuous positive airway pressure (CPAP) therapy in patients with obstructive sleep apnea enrolled in a comprehensive CPAP program in the community.

Prospective cohort longitudinal study.

University sleep disorders center.

Two hundred ninety-six patients with an apnea-hypopnea index (AHI) ≥20/h on polysomnography.

A CPAP device equipped with a monitoring chip was supplied. Within the first week, daily telephone contacts were made. Patients were seen at 2 weeks, 4 weeks, 3 months, and 6 months.

Of the 296 subjects enrolled, 81.1% were males. Mean ± SD AHI was 64.4 ± 34.2/h of sleep; age, 51 ± 11.7 years; and body mass index, 35.2 ± 7.9 kg/m². The mean duration of CPAP use was 5.7 h/d at 2 weeks, 5.7 h/d at 4 weeks, 5.9 h/d at 3 months, and 5.8 h/d at 6 months. The percentage of patients …