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Predicting uptake of continuous positive airway pressure (CPAP) therapy in obstructive sleep apnoea (OSA): a belief-based theoretical approach

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Abstract

Purpose

Obstructive sleep apnoea (OSA) is a common disorder, for which continuous positive airway pressure (CPAP) therapy is a standard treatment. Despite its well-established efficacy, many patients choose not to initiate CPAP treatment. The present study investigated the degree to which biological measures (e.g. Apnoea–Hypopnoea Index [AHI]), symptom experiences (e.g. fatigue) and illness representations (e.g. perceived consequences) predict the decision of individuals newly diagnosed with OSA to undergo a trial of CPAP therapy.

Methods

Four hundred forty-nine individuals (316 males) newly diagnosed with OSA. Epworth sleepiness scale (ESS), Fatigue Severity Scale, Depression Anxiety Stress Scale and Illness Perception Questionnaire-Revised (IPQ-R) were administered at time of sleep study. These, patient demographics and sleep study variables were used to determine factors predicting patient decision to proceed with a trial of CPAP.

Results

The participants were most likely to attribute their OSA to unchangeable and psychological factors. For those with moderate OSA (AHI, 15 to 30) IPQ-R illness consequence was predictive of decision to initiate CPAP (p = 0.002). For severe OSA (AHI >30) age, ESS and IPQ illness causal beliefs were predictive of decision to initiate CPAP (p < 0.001).

Conclusions

Illness beliefs are important determinants of the choice of recently diagnosed OSA patients whether or not to undertake a trial of CPAP therapy. Concerns about illness consequences were important in those with moderate OSA. In severe OSA, sleepiness symptoms are more prominent and a more significant determinant of CPAP uptake along with age and causal beliefs.

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Acknowledgments

This report would not have been possible without the essential and gracious support of many individuals: Christine Maguire and the sleep technologists of SCGH, as well as the students of UWA, Alisa Holt, Anna Wallace, Stephanie Whitworth, Alix Mellor, Andrew Nienaber, Jacinta Hatton and Shraddha Kashyup.

Conflicts of interest

Two of the authors (D. Hillman and P. Eastwood) are members of Apnex Medical Incorporated as consultants and as part of the medical advisory board.

Disclosures

No external financial support was provided for this project.

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Correspondence to Timothy Skinner.

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The work was performed at institutions 1, 2 and 3.

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Skinner, T., McNeil, L., Olaithe, M. et al. Predicting uptake of continuous positive airway pressure (CPAP) therapy in obstructive sleep apnoea (OSA): a belief-based theoretical approach. Sleep Breath 17, 1229–1240 (2013). https://doi.org/10.1007/s11325-013-0828-1

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  • DOI: https://doi.org/10.1007/s11325-013-0828-1

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