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Conference Paper: The relationship between sleep quality and daytime sleepiness with chronotype latent constructs: An exploratory and confirmatory factor analysis in Chinese college students

TitleThe relationship between sleep quality and daytime sleepiness with chronotype latent constructs: An exploratory and confirmatory factor analysis in Chinese college students
Authors
Issue Date2012
PublisherThe American Academy of Sleep Medicine. The Journal's web site is located at http://www.journalsleep.org
Citation
SLEEP 2012 - The 26th Annual Meeting of the Associated Professional Sleep Societies (APSS), Boston, MA., 9-13 June 2012. In Sleep, 2012, v. 35 Abstract Suppl., p. A69, abstract no. 0191 How to Cite?
AbstractIntroduction: The Composite Scale of Morningness (CSM) has been suggested to consist of two to three latent constructs. Yet, the role of each latent construct in relating to other sleep behaviors was unclear. This study examined the factor structure of CSM by exploratory and confirmatory factor analyses from structural equation modeling. We aim to elucidate the relationship between each CSM latent construct with daytime sleepiness and sleep quality with a Chinese sample. Methods: Participants (n=661, 18-25, Chinese undergraduates, 32.1% male) completed an online survey including the validated Chinese version of Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index(PSQI), and CSM, translated (with back translation) by our research team. Results: The CSM fits into a 3-factor model (CFI=.982, RMSEA=.047, SRMR=.039) with much better model fit indexes than a 2- or 1-factor model. The derived latent constructs captured individuals’ voluntary sleep-wake schedule, self-reported morningness/eveningness chronotype and alertness after waking-up. The 10th and 90th percentile scores are 23 and 40 indicating eveningness and morningness chronotypes, respectively. Correlational analyses revealed that a late voluntary sleepwake schedule, self-reported eveningness-chronotype and low alertness after waking-up were significantly correlated (p<.05) with a higher level of daytime sleepiness, worse subjective sleep quality, shorter sleep, lower sleep efficiency and greater daytime dysfunction. However, a longer sleep latency was not related to self-reported chronotype but the other two CSM latent constructs. Sleep disturbances and use of sleep medication were only correlated with low alertness after waking-up. Conclusion: A 3-factor model of CSM is validated with good psychometric properties. While the cutoff score for eveningness-chronotype is comparable with the original paper on Caucasians, a lower cut-off for morningness-chronotype is found among Chinese undergraduates. Regarding the factor structure, these 3 factors differ in their relationships with sleep quality dimensions. A 3-factor scoring of CSM is suggested for better delineation of the different aspects of circadian rhythm for future studies.
DescriptionBasic Science: Session 6. Chronobiology
Persistent Identifierhttp://hdl.handle.net/10722/165706
ISSN
2015 Impact Factor: 4.793
2015 SCImago Journal Rankings: 2.606

 

DC FieldValueLanguage
dc.contributor.authorWong, MLen_US
dc.contributor.authorLau, EYYen_US
dc.contributor.authorWan, HYen_US
dc.contributor.authorHui, HCCen_US
dc.contributor.authorCheung, SFen_US
dc.contributor.authorMok, DSYen_US
dc.date.accessioned2012-09-20T08:22:28Z-
dc.date.available2012-09-20T08:22:28Z-
dc.date.issued2012en_US
dc.identifier.citationSLEEP 2012 - The 26th Annual Meeting of the Associated Professional Sleep Societies (APSS), Boston, MA., 9-13 June 2012. In Sleep, 2012, v. 35 Abstract Suppl., p. A69, abstract no. 0191en_US
dc.identifier.issn0161-8105-
dc.identifier.urihttp://hdl.handle.net/10722/165706-
dc.descriptionBasic Science: Session 6. Chronobiology-
dc.description.abstractIntroduction: The Composite Scale of Morningness (CSM) has been suggested to consist of two to three latent constructs. Yet, the role of each latent construct in relating to other sleep behaviors was unclear. This study examined the factor structure of CSM by exploratory and confirmatory factor analyses from structural equation modeling. We aim to elucidate the relationship between each CSM latent construct with daytime sleepiness and sleep quality with a Chinese sample. Methods: Participants (n=661, 18-25, Chinese undergraduates, 32.1% male) completed an online survey including the validated Chinese version of Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index(PSQI), and CSM, translated (with back translation) by our research team. Results: The CSM fits into a 3-factor model (CFI=.982, RMSEA=.047, SRMR=.039) with much better model fit indexes than a 2- or 1-factor model. The derived latent constructs captured individuals’ voluntary sleep-wake schedule, self-reported morningness/eveningness chronotype and alertness after waking-up. The 10th and 90th percentile scores are 23 and 40 indicating eveningness and morningness chronotypes, respectively. Correlational analyses revealed that a late voluntary sleepwake schedule, self-reported eveningness-chronotype and low alertness after waking-up were significantly correlated (p<.05) with a higher level of daytime sleepiness, worse subjective sleep quality, shorter sleep, lower sleep efficiency and greater daytime dysfunction. However, a longer sleep latency was not related to self-reported chronotype but the other two CSM latent constructs. Sleep disturbances and use of sleep medication were only correlated with low alertness after waking-up. Conclusion: A 3-factor model of CSM is validated with good psychometric properties. While the cutoff score for eveningness-chronotype is comparable with the original paper on Caucasians, a lower cut-off for morningness-chronotype is found among Chinese undergraduates. Regarding the factor structure, these 3 factors differ in their relationships with sleep quality dimensions. A 3-factor scoring of CSM is suggested for better delineation of the different aspects of circadian rhythm for future studies.-
dc.languageengen_US
dc.publisherThe American Academy of Sleep Medicine. The Journal's web site is located at http://www.journalsleep.org-
dc.relation.ispartofSleepen_US
dc.titleThe relationship between sleep quality and daytime sleepiness with chronotype latent constructs: An exploratory and confirmatory factor analysis in Chinese college studentsen_US
dc.typeConference_Paperen_US
dc.identifier.emailLau, EYY: eyylau@hkucc.hku.hken_US
dc.identifier.emailHui, HCC: huiharry@hku.hken_US
dc.identifier.authorityLau, EYY=rp00634en_US
dc.identifier.authorityHui, HCC=rp00547en_US
dc.identifier.hkuros206038en_US
dc.identifier.volume35en_US
dc.identifier.issueAbstract Suppl.-
dc.identifier.spageA69, abstract no. 0191en_US
dc.identifier.epageA69, abstract no. 0191en_US
dc.publisher.placeUnited States-

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