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Quality of Life Research
Erschienen in: Quality of Life Research 7/2016

29.12.2015

Quality of life in Iranian patients with bipolar disorder: a psychometric study of the Persian Brief Quality of Life in Bipolar Disorder (QoL.BD)

verfasst von: Amirhossein Modabbernia, Mohammadhossein Yaghoubidoust, Chung-Ying Lin, Bengt Fridlund, Erin E. Michalak, Greg Murray, Amir H. Pakpour

Erschienen in: Quality of Life Research | Ausgabe 7/2016

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Abstract

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.
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Metadaten
Titel
Quality of life in Iranian patients with bipolar disorder: a psychometric study of the Persian Brief Quality of Life in Bipolar Disorder (QoL.BD)
verfasst von
Amirhossein Modabbernia
Mohammadhossein Yaghoubidoust
Chung-Ying Lin
Bengt Fridlund
Erin E. Michalak
Greg Murray
Amir H. Pakpour
Publikationsdatum
29.12.2015
Verlag
Springer International Publishing
Erschienen in
Quality of Life Research / Ausgabe 7/2016
Print ISSN: 0962-9343
Elektronische ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-015-1223-0

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