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08.03.2019 | Epidemiology • Original Article

Insomnia severity index: a psychometric investigation among Saudi nurses

verfasst von: Abdulrhman Albougami, Md. Dilshad Manzar

Erschienen in: Sleep and Breathing | Ausgabe 3/2019

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Abstract

Background

Insomnia is the most prevalent sleep disorder, but it is widely untreated and under-diagnosed in Saudi Arabia. Moreover, no tool to screen insomnia has been validated in the Saudi population in general or nurses in particular. This study, therefore, assessed the psychometric validity of the Insomnia Severity Index (ISI) in Saudi nurses.

Methods

A cross-sectional study with purposive sampling was performed with nurses (n = 134, age = 21–48 years) from Al Majmaah, Saudi Arabia. Both conventional and online survey methods using the ISI, a brief measure of metacognition, and a socio-demographics questionnaire were employed.

Results

No ceiling or floor effects were found in the ISI total score (8.84 ± 5.07) or the factor scores, but the floor effect was found in the item scores. A two-factor model showed the best fit (Pclose .97, comparative fit index [CFI] 1.00, root mean square error of approximation [RMSEA] 0.00, non-significant χ²test, χ²/df 0.904). This model showed favorable configural, metric, scalar, and partial strict invariance across gender groups (CFI > .95, RMSEA < .05, χ²/df < 3, non-significant Δχ², ΔCFI ≤ .01). The internal consistency was adequate (Cronbach’s alpha = 0.75, 0.78 for the two factors of the ISI). The lack of correlations between the ISI scores and the scores of the brief measure of the metacognition favored its divergent validity.

Conclusion

The ISI showed adequate psychometric validity for screening insomnia among Saudi nurses.

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Titel: Insomnia severity index: a psychometric investigation among Saudi nurses
verfasst von: Abdulrhman Albougami
Md. Dilshad Manzar
Publikationsdatum: 08.03.2019
Verlag: Springer International Publishing
Erschienen in: Sleep and Breathing / Ausgabe 3/2019
Print ISSN: 1520-9512
Elektronische ISSN: 1522-1709
DOI: https://doi.org/10.1007/s11325-019-01812-8

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