Purpose: To determine the predictive factors of initial and long-term adherence to positive airway pressure (PAP) therapy and factors leading to an unfavorable shift of PAP compliance.
Methods: This follow-up study was comprised of newly diagnosed patients with obstructive sleep apnea (OSA) amenable to PAP therapy from January 2017 to April 2019. Information on basic demographics, comorbidities, and sleep-related symptoms were collected. PAP adherence data were collected at the end of the first week and the third month.
Results: Of 166 patients enrolled, data from 142 (86%) were in the final analysis. Overall PAP usage was worse at 3 months declining from the first week. After adjusting for age and gender, multinomial logistic regression analysis showed that a small number of sleep-related symptoms (OR, 0.69; 95% CI, 0.52-0.91) and low arousal threshold (ArTH) (OR, 4.44; 95% CI, 1.52-12.98) were associated with higher odds of noncompliance. Low ArTH (OR, 2.87; 95% CI, 1.09-7.57) and lower body mass index (BMI) (OR, 0.88; 95% CI, 0.78-0.99) increased the risk of compliance-to-noncompliance shift. Sixty-two patients with polysomnography were analyzed separately. After adjustment for age and gender, poor sleep efficiency (OR, 0.80; 95% CI, 0.68-0.94) was associated with higher odds of consistent noncompliance. Low ArTH (OR, 15.36; 95% CI, 1.44-164.24) increased the risk of compliance-to-noncompliance shift in this subgroup.
Conclusions: Lower BMI and low ArTH were associated with an unfavorable shift of PAP compliance over time in patients with OSA, which was different from the predictors of consistent PAP noncompliance of patients with OSA.
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