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Proposition of a Shortened Version of the Self-efficacy Measure for Sleep Apnea (SEMSA-15): Psychometric Validation and Cut-Off Score for CPAP Adherence

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Abstract

Background

The Self-Efficacy Measure for Sleep Apnea (SEMSA) is a 26-item questionnaire that investigates perceived risks, outcome expectancies and self-efficacy, i.e., the confidence to undertake treatment, in the context of continuous positive airway pressure (CPAP) interventions for sleep apnea syndrome. This questionnaire can be considered too lengthy for clinical practice; therefore, a shortened version is needed.

Methods

290 adults undergoing CPAP treatment completed the SEMSA-26. An item reduction process took into account both the results of statistical analyses and the expertise of a steering committee. Construct validity, reliability and external validity were tested for a 15-item short version. Additionally, CPAP adherence (usage more than 4 h per night) was collected, and receiver operating characteristics analyses were performed to establish the cut-off point of the SEMSA-15 that would best classify patients depending on their adherence.

Results

The structure of the SEMSA-15 was confirmed by principal components factor analysis. Cronbach’s alpha coefficients ranged from 0.66 to 0.86. The SEMSA-15 dimension scores were highly correlated with their respective SEMSA-26 dimension scores. The self-efficacy sub-score of the SEMSA-15 obtained the best classification performance, with a cut-off point of 2.78 to predict CPAP adherence.

Conclusion

The SEMSA-15 seems to be appropriate for use in clinical practice to investigate beliefs and perception of self-efficacy in CPAP interventions. It is, therefore, a useful tool to predict long-term adherence to treatment.

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Authors and Affiliations

  1. USR CNRS 3413 SANPSY– Sommeil, Addiction et Neuropsychiatrie, Université de Bordeaux, Site Carreire – Zone Nord, Bat 3B, 3rd Floor, 33076, Bordeaux Cedex, France

    Lucile Dupuy, Stéphanie Bioulac, Kelly Guichard, Pierre Philip & Jean-Arthur Micoulaud-Franchi

  2. Clinique du Sommeil, Service d’Explorations Fonctionnelles du Système Nerveux, CHU de Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France

    Stéphanie Bioulac, Olivier Coste, Kelly Guichard, Pierre-Jean Monteyrol, Imad Ghorayeb, Pierre Philip & Jean-Arthur Micoulaud-Franchi

  3. Institut de Neurosciences Cognitives et Intégratives d’Aquitaine, UMR 5287, Université de Bordeaux, Bordeaux, France

    Imad Ghorayeb

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  1. Lucile Dupuy
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  2. Stéphanie Bioulac
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  3. Olivier Coste
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  4. Kelly Guichard
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  6. Imad Ghorayeb
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  7. Pierre Philip
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  8. Jean-Arthur Micoulaud-Franchi
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Correspondence to Lucile Dupuy.

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This study was conducted in accordance with the Declaration of Helsinki and French Good Clinical Practices.

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Dupuy, L., Bioulac, S., Coste, O. et al. Proposition of a Shortened Version of the Self-efficacy Measure for Sleep Apnea (SEMSA-15): Psychometric Validation and Cut-Off Score for CPAP Adherence. Sleep Vigilance 4, 17–21 (2020). https://doi.org/10.1007/s41782-020-00083-8

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  • DOI: https://doi.org/10.1007/s41782-020-00083-8

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