Psychological versus physiological correlates of sleep apnoea treatment adherence


Continuous Positive Airway Pressure (CPAP) is an effective therapy for Obstructive Sleep Apnoea (OSA), but adherence is poor. This study tested a motivational model of adherence at 3 months post-treatment initiation. 77 consecutive patients (61% male) newly diagnosed with OSA completed questionnaires assessing; outcome expectancy with treatment, self-efficacy, functional outcomes of sleepiness, and perceived risk of negative health outcomes. Physiological data from a standard clinical diagnostic sleep study were obtained. Average objective adherence to CPAP was 4.57 hours per night. Physiological indices correlated with adherence in the opposite direction to that expected. Fewer oxygen dips and fewer arousals before treatment were associated with greater adherence at 3 months. In a hierarchical regression, these physiological variables did not explain significant portions of the variance in CPAP adherence (10.4%, p>.05), whilst treatment outcome expectancies and functional outcomes of sleep explained a unique proportion of the variance (15.3%,

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University of Queensland eSpace

Last time updated on 30/08/2013

This paper was published in University of Queensland eSpace.

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