Psychometric Properties of the Translation, Adaptation, and Validation of the Modified Yorkshire Rehabilitation Scale (C19-YRSm) in Mexican Population

Long Covid is a multisystemic syndrome that can affect various systems, presenting signs and symptoms that can be disabling and significantly impact the quality of life of those affected. Objectives: This study aimed to translate, adapt, and validate the psychometric properties of the C19-YRSm in Spanish for the Mexican population. Method: A total of 889 participants were recruited from February to November 2023. Invitations were extended through social media to Mexican men and women over 18 years old who had experienced COVID-19 symptoms at any point, to participate in this study by completing the C19-YRSm. Data collection took place from February to November 2023. Results: The C19-YRSm instrument demonstrated adequate scale characteristic properties. Item-total correlations ranged from 0.28 to 0.67 for SS and 0.45 to 0.75 for FD, with good internal reliability (Cronbach’s alpha of 0.87 for SS and 0.82 for FD). Convergent validity showed a strong positive association between SS and FD. Factor analysis supported a two-factor structure of SS and FD. Conclusions: The evidence presented in this research project, along with findings reported by other authors in different validations of the C19-YRSm, suggests it is a specific, valid, and reliable tool for assessing and monitoring Long Covid.