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Title: Psychometric evaluation of the Chinese recovering quality of life (ReQoL) outcome measure and assessment of health-related quality of life during the COVID-19 pandemic
Authors: Xu, RH 
Keetharuth, AD
Wang, LL
Cheung, AWL
Wong, ELY
Issue Date: Jul-2021
Source: Frontiers in psychology, July 2021, v. 12, 663035
Abstract: Objective: The primary objective was to translate the Recovering Quality of Life (ReQoL) measures from English to traditional Chinese and assess their psychometric properties in Hong Kong (HK) Chinese population. The secondary objective was to investigate the mental health-related quality of life (HRQoL) of this sample during the coronavirus disease 2019 (COVID-19) pandemic.
Method: Recovering Quality of Life was translated to Traditional Chinese adhering to standard guideline recommended by the official distributors. Five hundred members of the general population were successfully recruited to participate in a telephone-based survey. The following psychometric properties of the ReQoL were evaluated: construct, convergent, and known-group validity and internal consistency and test–retest reliability. The item measurement invariance was assessed on the basis of differential item functioning (DIF). Multiple regression analysis was used to assess the relationship between respondents’ characteristics and mental HRQoL.
Results: Results of confirmatory factor analysis (CFA) supported a two-factor structure of the ReQoL. The ReQoL showed significant correlations with the other mental health, quality of life, and well-being measures, which indicated a satisfactory convergent validity. Known-group validity confirmed that ReQoL is able to differentiate between people with different mental health status. The (Cronbach’s alpha = 0.91 and 0.76 for positive [PF] and negative [NF] factor), and McDonald’s omega of 0.89 (PF = 0.94, NF = 0.82) indicated the ReQoL has good reliability as well as test–retest reliability with an intraclass correlation coefficient of 0.75. Four items showed negligible DIF with respect to age. Respondents who were highly educated and without psychological problems reported a high ReQoL score.
Conclusion: Traditional Chinese ReQoL was shown to be a valid and reliable instrument to assess the recovery-focused quality of life in HK general population. Future studies are needed to appraise its psychometric properties in local people experiencing mental disorders.
Keywords: China
Health-related quality of life
Mental health
Psychometric properties
Recovery
ReQoL
Validation
Publisher: Frontiers Research Foundation
Journal: Frontiers in psychology 
EISSN: 1664-1078
DOI: 10.3389/fpsyg.2021.663035
Rights: © 2021 Xu, Keetharuth, Wang, Cheung and Wong. This is an openaccess article distributed under the terms of the Creative Commons Attribution License (CC BY) (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
The following publication Xu RH, Keetharuth AD, Wang L-l, Cheung AW-l and Wong EL-y (2021) Psychometric Evaluation of the Chinese Recovering Quality of Life (ReQoL) Outcome Measure and Assessment of Health-Related Quality of Life During the COVID-19 Pandemic. Front. Psychol. 12:663035 is available at https://doi.org/10.3389/fpsyg.2021.663035
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