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Article: Subjective-Objective Sleep Discrepancy in Schizophrenia

TitleSubjective-Objective Sleep Discrepancy in Schizophrenia
Authors
KeywordsSchizophrenia
Sleep
Sleep disturbances
Issue Date2020
PublisherLawrence Erlbaum Associates, Inc. The Journal's web site is located at http://www.leaonline.com/loi/bsm
Citation
Behavioral Sleep Medicine, 2020, v. 18 n. 5, p. 653-667 How to Cite?
AbstractObjective/Background: Subjective methods are often employed for sleep assessment due to their ease of use, but the results may not concur with objective findings. This discrepancy may be present in schizophrenia; however, limited data are available. We performed a secondary analysis to evaluate the agreement between 1-week actigraphy and sleep diary-derived parameters and factors that contribute to subjective-objective sleep discrepancy. Participants: 66 outpatients with schizophrenia (mean age = 44.08 years; 45.45% males). Methods: Agreement between subjective-objective parameters was assessed using two-way repeated measures ANOVA, Pearson’s correlation, and Bland-Altman plot. The magnitude of discrepancy was quantified using Cohen’s d. Pearson’s correlation was used to determine the significant factors of subjective-objective sleep discrepancy. Benjamini-Hochberg adjustment was performed to account for multiple testing. Results: On average, sleep diaries overestimated sleep onset latency by 20.45 min, total sleep time by 37.63 min, and sleep efficiency by 4.29%, but underestimated wake after sleep onset by 33.28 min. Cohen’s d ranged between 0.61 and 1.41. Subjective-objective discrepancies were significantly associated with marital and employment status, self-reported sleep disturbance, delayed sleep-wake phase disorder, chronotype, and psychosocial functioning (r = 0.32–0.44; Benjamini-Hochberg corrected p < .05). Conclusions: Our findings show that differences between subjective and objective measurements of sleep are present in schizophrenia. Although actigraphy is not a standard procedure for sleep disturbance in schizophrenia, clinical judgment should be used if patients are suspected to have overestimated their sleep difficulties. Further studies should examine whether feedback based on actigraphy can benefit patients with schizophrenia and comorbid sleep disturbances. © 2019, © 2019 Taylor & Francis Group, LLC.
Persistent Identifierhttp://hdl.handle.net/10722/275148
ISSN
2019 Impact Factor: 2.39
2015 SCImago Journal Rankings: 1.008

 

DC FieldValueLanguage
dc.contributor.authorChung, KF-
dc.contributor.authorPoon, YPYP-
dc.contributor.authorNg, TK-
dc.contributor.authorKan, CK-
dc.date.accessioned2019-09-10T02:36:31Z-
dc.date.available2019-09-10T02:36:31Z-
dc.date.issued2020-
dc.identifier.citationBehavioral Sleep Medicine, 2020, v. 18 n. 5, p. 653-667-
dc.identifier.issn1540-2002-
dc.identifier.urihttp://hdl.handle.net/10722/275148-
dc.description.abstractObjective/Background: Subjective methods are often employed for sleep assessment due to their ease of use, but the results may not concur with objective findings. This discrepancy may be present in schizophrenia; however, limited data are available. We performed a secondary analysis to evaluate the agreement between 1-week actigraphy and sleep diary-derived parameters and factors that contribute to subjective-objective sleep discrepancy. Participants: 66 outpatients with schizophrenia (mean age = 44.08 years; 45.45% males). Methods: Agreement between subjective-objective parameters was assessed using two-way repeated measures ANOVA, Pearson’s correlation, and Bland-Altman plot. The magnitude of discrepancy was quantified using Cohen’s d. Pearson’s correlation was used to determine the significant factors of subjective-objective sleep discrepancy. Benjamini-Hochberg adjustment was performed to account for multiple testing. Results: On average, sleep diaries overestimated sleep onset latency by 20.45 min, total sleep time by 37.63 min, and sleep efficiency by 4.29%, but underestimated wake after sleep onset by 33.28 min. Cohen’s d ranged between 0.61 and 1.41. Subjective-objective discrepancies were significantly associated with marital and employment status, self-reported sleep disturbance, delayed sleep-wake phase disorder, chronotype, and psychosocial functioning (r = 0.32–0.44; Benjamini-Hochberg corrected p < .05). Conclusions: Our findings show that differences between subjective and objective measurements of sleep are present in schizophrenia. Although actigraphy is not a standard procedure for sleep disturbance in schizophrenia, clinical judgment should be used if patients are suspected to have overestimated their sleep difficulties. Further studies should examine whether feedback based on actigraphy can benefit patients with schizophrenia and comorbid sleep disturbances. © 2019, © 2019 Taylor & Francis Group, LLC.-
dc.languageeng-
dc.publisherLawrence Erlbaum Associates, Inc. The Journal's web site is located at http://www.leaonline.com/loi/bsm-
dc.relation.ispartofBehavioral Sleep Medicine-
dc.rightsPreprint: This is an Author's Original Manuscript of an article published by Taylor & Francis Group in [JOURNAL TITLE] on [date of publication], available online: http://www.tandfonline.com/doi/abs/[Article DOI]. Postprint: This is an Accepted Manuscript of an article published by Taylor & Francis Group in [JOURNAL TITLE] on [date of publication], available online at: http://www.tandfonline.com/doi/abs/[Article DOI].-
dc.subjectSchizophrenia-
dc.subjectSleep-
dc.subjectSleep disturbances-
dc.titleSubjective-Objective Sleep Discrepancy in Schizophrenia-
dc.typeArticle-
dc.identifier.emailChung, KF: kfchung@hku.hk-
dc.identifier.authorityChung, KF=rp00377-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/15402002.2019.1656077-
dc.identifier.scopuseid_2-s2.0-85071023220-
dc.identifier.hkuros302992-
dc.identifier.volume18-
dc.identifier.issue5-
dc.identifier.spage653-
dc.identifier.epage667-
dc.publisher.placeUnited States-

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