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dc.contributor.authorJackowska, M
dc.contributor.authorRonaldson, A
dc.contributor.authorBrown, J
dc.contributor.authorSteptoe, A
dc.date.accessioned2019-04-30T10:51:39Z
dc.date.available2019-04-30T10:51:39Z
dc.date.issued2016-03-23
dc.identifier.issn0022-3999
dc.identifier.urihttps://qmro.qmul.ac.uk/xmlui/handle/123456789/57215
dc.description.abstractOBJECTIVE: Objective and self-reported sleep are only moderately correlated and it is uncertain if these two types of sleep measures are associated with distinct biological and psychological outcomes. METHODS: Participants were 119 healthy women aged 26years on average. Cortisol and blood pressure assessed over one day were the measures of biological function. Psychological variables included optimism, life satisfaction, positive and negative affect as well as emotional distress. Sleep was assessed with the Pittsburgh Quality Index (PSQI), wrist actigraphy and sleep diaries. RESULTS: Global sleep ratings on the PSQI were unrelated to objective sleep efficiency, duration or latency. Sleep duration derived from sleep diaries was highly correlated with objective duration but was unrelated to the PSQI measure. More disturbed sleep on the PSQI was associated with lower psychological wellbeing, as indicated by reduced levels of optimism, life satisfaction and positive affect as well as greater negative affect and emotional distress. Objective sleep efficiency was reduced among participants with lower positive and higher negative affect but there were no other associations between objective sleep indicators and psychological variables tested in our study. Participants with poorer self-reported sleep had lower cortisol awakening response while those with longer objective sleep latency had higher diastolic blood pressure, independently of covariates. CONCLUSION: Our study reveals that self-reported and objective sleep measures, in particular those regarding sleep quality, are weakly associated but have different psychological and biological correlates. This suggests that findings relating self-reported sleep may not necessarily be corroborated by objective sleep indicators. Copyright © 2016 Elsevier Inc. All rights reserved.en_US
dc.description.sponsorshipBiotechnology and Biological Sciences Research Council, Unilever Discover (BB/H53106X/1)en_US
dc.description.sponsorshipEconomic and Social Research Council (ESRC PhD studentship)en_US
dc.format.extent52 - 55
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofJournal of Psychosomatic Research
dc.rights© 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectSleepen_US
dc.subjectMeasurementen_US
dc.subjectCortisolen_US
dc.subjectBlood pressureen_US
dc.subjectPsychological wellbeingen_US
dc.titleBiological and psychological correlates of self-reported and objective sleep measuresen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.jpsychores.2016.03.017
pubs.notesNot knownen_US
pubs.publication-statusPublisheden_US
pubs.volume84en_US
dcterms.dateAccepted2016-03-20
rioxxterms.funderDefault funderen_US
rioxxterms.identifier.projectDefault projecten_US


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