• Delwyn Bartlett, Keith Wong, Dianne Richards, Emma Moy, Colin A Espie, Peter A Cistulli, and Ronald Grunstein.
• NHMRC Centre for Integrated Research in Understanding of Sleep (CIRUS), University of Sydney, Sydney, Australia ; Sleep and Circadian Research Group Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia.
• Sleep. 2013 Nov 1;36(11):1647-54.

ObjectiveTo examine whether a social cognitive therapy (SCT) intervention increases continuous positive airway pressure (CPAP) use compared to equivalent social interaction (SI) time.ParticipantsIndividuals with obstructive sleep apnea (OSA) referred for CPAP therapy.InterventionParticipants received a 30-min group education session regarding OSA and CPAP. Groups of three to four participants were then randomly assigned to an SCT session or social interaction.MeasurementsCPAP usage was assessed at 7 nights, then 1, 3, and 6 months. The two primary outcomes were adherence, usage ≥ 4 h per night at 6 months, and uptake of CPAP. Questionnaires were given pretreatment and posttreatment.ResultsTwo hundred six individuals were randomized to SI (n = 97) or SCT (n = 109). CPAP uptake was not different between groups (82% in SI, 88% in SCT groups, P = 0.35). There were no differences between groups in adherence: 63-66% at 1 week, and at 6 months 55-47% (P = 0.36). Higher pretreatment apnea-hypopnea index, higher baseline self-efficacy, and use of CPAP (≥ 4 h) at 1 week were independent predictors of CPAP adherence at 6 months. CPAP adherence increased by a factor of 1.8 (odds ratio = 1.8, 95% confidence interval 1.1-3.0) for every one-unit increase in self-efficacy. There was no difference between groups postintervention in self-efficacy scores, sleepiness, mood, or sleep quality.ConclusionsIn this randomized trial, a single SCT application did not increase adherence when compared with SI time. Although self-efficacy scores prior to CPAP predicted adherence, self-efficacy was not increased by the interventions. Increasing intensity and understanding of SCT interventions may be needed to improve CPAP adherence.Clinical Trials RegistrationAustralian New Zealand Clinical Trials Registry, ACTRN12607000424404.

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