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Article: Factor structure of the Chinese version of the Pittsburgh Sleep Quality Index in breast cancer patients

TitleFactor structure of the Chinese version of the Pittsburgh Sleep Quality Index in breast cancer patients
Authors
Issue Date2014
PublisherElsevier Science. The Journal's web site is located at http://www.elsevier.com/locate/sleep
Citation
Sleep Medicine, 2014, v. 15 n. 5, p. 565-569 How to Cite?
AbstractObjective The Pittsburgh Sleep Quality Index (PSQI) is used extensively to assess subjective sleep disturbance in cancer populations. Although previous studies on the PSQI suggested a better fit for a two- or three-factor model than the original one-factor model, none accounted for the indicator-specific effect between sleep duration and habitual sleep efficiency. This study evaluated the PSQI’s dimensionality and its convergent validity with cancer-related psychopathological states in female breast cancer patients. Methods The PSQI was administered to 197 women with breast cancer. Confirmatory factor analysis examined the relative fit of one-, two-, three-, and revised one-factor models. The PSQI’s convergent validity was evaluated via bivariate correlations between the PSQI factor scores and measures of anxiety, depression, fatigue, pain, and quality of life. Results Confirmatory factor analyses showed an adequate fit for the revised one-factor model with the PSQI global score as the overall index of sleep disturbance. Although the revised one- and two-factor solutions showed statistically equivalent model fits, the one-factor model was selected due to utility reasons. The severity of sleep dysfunction that the PSQI global score represented was positively correlated with anxiety, depression, fatigue, pain, and reduced quality of life. Conclusion The results support the PSQI’s original unidimensional structure, demonstrating that the PSQI global score is a valid and parsimonious measure for assessing and screening sleep dysfunction in cancer patients.
Persistent Identifierhttp://hdl.handle.net/10722/205998
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHo, RTHen_US
dc.contributor.authorFong, TCTen_US
dc.date.accessioned2014-10-20T10:52:41Z-
dc.date.available2014-10-20T10:52:41Z-
dc.date.issued2014en_US
dc.identifier.citationSleep Medicine, 2014, v. 15 n. 5, p. 565-569en_US
dc.identifier.urihttp://hdl.handle.net/10722/205998-
dc.description.abstractObjective The Pittsburgh Sleep Quality Index (PSQI) is used extensively to assess subjective sleep disturbance in cancer populations. Although previous studies on the PSQI suggested a better fit for a two- or three-factor model than the original one-factor model, none accounted for the indicator-specific effect between sleep duration and habitual sleep efficiency. This study evaluated the PSQI’s dimensionality and its convergent validity with cancer-related psychopathological states in female breast cancer patients. Methods The PSQI was administered to 197 women with breast cancer. Confirmatory factor analysis examined the relative fit of one-, two-, three-, and revised one-factor models. The PSQI’s convergent validity was evaluated via bivariate correlations between the PSQI factor scores and measures of anxiety, depression, fatigue, pain, and quality of life. Results Confirmatory factor analyses showed an adequate fit for the revised one-factor model with the PSQI global score as the overall index of sleep disturbance. Although the revised one- and two-factor solutions showed statistically equivalent model fits, the one-factor model was selected due to utility reasons. The severity of sleep dysfunction that the PSQI global score represented was positively correlated with anxiety, depression, fatigue, pain, and reduced quality of life. Conclusion The results support the PSQI’s original unidimensional structure, demonstrating that the PSQI global score is a valid and parsimonious measure for assessing and screening sleep dysfunction in cancer patients.en_US
dc.languageengen_US
dc.publisherElsevier Science. The Journal's web site is located at http://www.elsevier.com/locate/sleepen_US
dc.relation.ispartofSleep Medicineen_US
dc.rightsSleep Medicine. Copyright © Elsevier Science.en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleFactor structure of the Chinese version of the Pittsburgh Sleep Quality Index in breast cancer patientsen_US
dc.typeArticleen_US
dc.identifier.emailHo, RTH: tinho@hku.hken_US
dc.identifier.emailFong, TCT: h0330997@graduate.hku.hken_US
dc.identifier.authorityHo, RTH=rp00497en_US
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1016/j.sleep.2013.10.019en_US
dc.identifier.pmid24759325-
dc.identifier.hkuros240750en_US
dc.identifier.hkuros228841-
dc.identifier.hkuros245871-
dc.identifier.volume15en_US
dc.identifier.issue5en_US
dc.identifier.spage565en_US
dc.identifier.epage569en_US
dc.identifier.isiWOS:000335917400014-

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