The sarcopenia quality-of-life (SarQoL)® questionnaire is a multidimensional sarcopenia specific tool designed for community dwelling older adults.
The aim of this study was to translate, to cross-culturally adapt and validate the SarQoL® questionnaire to assess sarcopenia-related quality of life in Turkish older adults.
The validation process was performed in two sections: the first section constituted the translation with cross-cultural adaptation of SarQoL® into Turkish. Second section constituted the clinical validation study. To validate the Turkish version of the SarQoL®, we assessed its validity (discriminative power, construct validity), reliability (internal consistency, test–retest reliability) and floor/ceiling effects.
One hundred community-dwelling subjects (mean age: 74.7 ± 6.1 years) were evaluated. The EWGSOP2 consensus diagnostic criteria were used to diagnose probable sarcopenia. A database including 1437 older adults, with complete evaluation of sarcopenia parameters, served to define low global muscle function. Results revealed a good discriminative power: subjects with probable sarcopenia had higher total scores compared to non-sarcopenic subjects (50 ± 16 vs. 68.9 ± 16.9, p < 0.001) a high internal consistency (Cronbach’s alpha: 0.88), consistent construct validity and excellent test–retest reliability (intraclass correlation coefficient: 0.97, 95% confidence interval: 0.94–0.98). There was no floor/ceiling effect.
The Turkish version of the SaQoL® questionnaire was found to be reliable and valid for the measurement of quality of life of sarcopenic patients and is, therefore, available for use in clinical research and practice. This validation could enable use of the SarQoL® tool in the eastern populations more confidently.
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We would like to thank Prof. Erhan Eser for his help in EQ-5D calculations. We would also like to thank to Anton Geerinck for his review and comments on the article. The authors of the present study certify that they comply with the ethical guidelines for authorship and publishing.
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All authors declare that they have no conflict of interest.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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The study was conducted according to guidelines in the Declaration of Helsinki. The study was approved from the Istanbul University Ethics Committee (number: 2018/989).
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Erdogan, T., Eris, S., Avci, S. et al. Sarcopenia quality-of-life questionnaire (SarQoL)®: translation, cross-cultural adaptation and validation in Turkish. Aging Clin Exp Res 33, 2979–2988 (2021). https://doi.org/10.1007/s40520-020-01780-0
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