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The Polysomnographical Meaning of Changed Sleep Quality-A Study of Treatment with Reduced Time in Bed
Stockholm University, Faculty of Social Sciences, Department of Psychology, Stress Research Institute. Stockholm University, Faculty of Social Sciences, Department of Psychology, Biological psychology.ORCID iD: 0000-0003-3480-9476
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Number of Authors: 72023 (English)In: Brain Sciences, ISSN 2076-3425, E-ISSN 2076-3425, Vol. 13, no 10, article id 1426Article in journal (Refereed) Published
Abstract [en]

Background: Reports of poor sleep are widespread, but their link with objective sleep (polysomnography-PSG) is weak in cross-sectional studies. In contrast, the purpose of this study was to investigate the association between changes in subjective and objective sleep variables using data from a study of the reduction in time in bed (TIB). Methods: One sleep recording was carried out at baseline and one at treatment week 5 (end of treatment) (N = 34). Results: The Karolinska Sleep Quality Index improved and was correlated with improvement in sleep efficiency (r = 0.41, p < 0.05) and reduction in TIB (r = -0.47, p < 0.01) and sleep latency (r = 0.36, p < 0.05). The restorative sleep index showed similar results. Improvements in the insomnia severity index (ISI) essentially lacked correlations with changes in the PSG variables. It was suggested that the latter may be due to the ISI representing a week of subjective sleep experience, of which a single PSG night may not be representative. Conclusions: It was concluded that changes in the subjective ratings of sleep are relatively well associated with changes in the PSG-based sleep continuity variables when both describe the same sleep.

Place, publisher, year, edition, pages
MDPI, 2023. Vol. 13, no 10, article id 1426
Keywords [en]
subjective sleep, objective sleep, ratings, PSG, sleep restriction, sleep compression
National Category
Basic Medicine Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-224246DOI: 10.3390/brainsci13101426ISI: 001098274900001PubMedID: 37891794Scopus ID: 2-s2.0-85175447227OAI: oai:DiVA.org:su-224246DiVA, id: diva2:1817485
Note

This research was funded by FAS (Forskningsrådet för Arbetsliv och Samhälle) FAS dnr 2009-1758.

Available from: 2023-12-06 Created: 2023-12-06 Last updated: 2024-01-11Bibliographically approved

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D'Onofrio, PaoloSchwarz, Johanna F. A.Åkerstedt, Torbjörn

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