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Quality of life in Iranian patients with bipolar disorder: a psychometric study of the Persian Brief Quality of Life in Bipolar Disorder (QoL.BD)
Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Social Determinants of Health Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Department of Public Health, College of Medicine, National Cheng Kung Universtiy, Tainan, Taiwan.
Jönköping University, School of Health and Welfare, HHJ, Dep. of Nursing Science. Jönköping University, School of Health and Welfare, HHJ. ADULT.
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2016 (English)In: Quality of Life Research, ISSN 0962-9343, E-ISSN 1573-2649, Vol. 25, no 7, 1835-1844 p.Article in journal (Refereed) Published
Abstract [en]

Purpose

To assess the reliability, validity, and factor structure of the Persian Brief Quality of Life in Bipolar Disorder (QoL.BD) in Iranian patients with bipolar disorder (BD).

Methods

After translation and cross-cultural adaptation of the Brief QoL.BD, we administered the questionnaire to 184 patients diagnosed with BD. To determine factor structure, we performed both exploratory and confirmatory factor analyses. To investigate the reliability, we assessed internal consistency, reproducibility and agreement. Construct validity was assessed by calculating correlations between the Brief QoL.BD and the Short Form-36 (SF-36), Positive And Negative Affect Schedule (PANAS), Hamilton Depression Rating Scale, Young Mania Rating Scale (YMRS) and Quality of Life Enjoyment and Satisfaction Questionnaire Short Form (Q-LES-Q-SF). We also investigated gender differences in interpretations of QoL.BD items.

Results

The results obtained from reliability analysis confirmed internal consistency (Cronbach’s alpha was 0.87 and 0.89 for two assessments) and reproducibility and agreement (the intraclass correlation coefficient ranged between 0.74 and 0.94). Validity analyses showed that the items loaded on a single-factor structure. The inter-item correlations varied from 0.31 to 0.68. Significantly lower scores on the Brief QoL.BD were observed in people diagnosed with BD I compared to BD II. Significant correlations were observed between the Brief QoL.BD and SF-36 summary measures, HAMD, YMRS, Q-LES-Q-SF and PANAS subscales. Items in the Brief QoL.BD were interpreted similarly by men and women.

Conclusions

The Brief Persian QoL.BD is a psychometrically sound measure with acceptable validity and reliability and provides a rapid assessment tool for measuring QoL in patients with BD.

Place, publisher, year, edition, pages
2016. Vol. 25, no 7, 1835-1844 p.
Keyword [en]
Bipolar disorder, Factor analysis, Quality of life, Persian, Reliability, Validity
National Category
Nursing
Identifiers
URN: urn:nbn:se:hj:diva-28939DOI: 10.1007/s11136-015-1223-0ISI: 000377452600023PubMedID: 26714698Scopus ID: 2-s2.0-84951952502Local ID: HHJADULTISOAI: oai:DiVA.org:hj-28939DiVA: diva2:892506
Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2016-09-06Bibliographically approved

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CiteExportLink to record
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Citation style
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