Abstract
A quality of life questionnaire specific to sarcopenia (SarQoL®) was successfully developed. There is a huge demand for translation and validation in Chinese. The aim of this study was to translate the SarQoL® into Chinese and investigate its psychometric properties. The translation and cross-cultural adaptation process recommended by the developers of the initial questionnaire was followed. A total of 159 participants were investigated. The translation process consists of five steps: (1) two bilinguals independently translate initial English to Chinese; (2) synthesize the two translations into one; (3) backward translations; (4) expert committee review and (5) test of the pre-final version. The validation consists of three parts: (1) validity (discriminative power, construct validity); (2) reliability (internal consistency, test–retest reliability) and (3) floor and ceiling effects. There was no difficulty in translation process. Regarding the validity, good discriminant validity {quality of life for sarcopenic subjects [35.56 (29.73–42.70)] vs. non-sarcopenic ones [73.22 (60.09–82.90)], p < 0.001} and consistent construct validity [high correlations (spearman’s r) of SarQoL® with generic Short Form-36 version 2 questionnaire (0.250 to 0.824) and EuroQoL-5-Dimension questionnaire (− 0.114 to − 0.823)] were found in SarQoL®. Regarding reliability, high internal consistency (Cronbach’s alpha coefficient was 0.867) and excellent test–retest reliability (intraclass coefficient correlation was 0.997, 95% CI 0.994–0.998) were found. No ceiling/floor effect was reflected. A valid SarQoL® questionnaire is now available for Chinese population. It can provide a better understanding of the sarcopenia disease burden and serve as a therapeutic outcome indicator in research.
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Indicate authors’ role in study concept and design, acquisition of subjects and/or data, analysis and interpretation of data, and preparation of manuscript. Study concept and design, XL, YW and DH; acquisition of subjects and/or data, LS, XL and QS; analysis and interpretation of data, XL; preparation of manuscript, XL and YW; validation, DD, XC, HLEL and BYN.
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Xiaofeng Le, Yao Wei, Dingjun Hao, Lequn Shan, Xiaoli Li, Qifang Shi, Ding Ding, Xiang Cheng, Hwee Ling Eileen Lim and Bao Yi Ng declare that there is no conflict of interest in relation to this work.
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Le, X., Wei, Y., Hao, D. et al. Psychometric Properties of the Chinese Version of the Sarcopenia and Quality of Life, a Quality of Life Questionnaire Specific for Sarcopenia. Calcif Tissue Int 109, 415–422 (2021). https://doi.org/10.1007/s00223-021-00859-8
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DOI: https://doi.org/10.1007/s00223-021-00859-8