Cystatin-c / total cholesterol ratio as a predictor of probable sarcopenia in geriatric population from 12 European countries.

Background: A low handgrip strength (HGS) is associated with several diseases in older adults. However, predictive biomarkers of future low HGS are poorly known. We investigated the prognostic efficacy of the ratio of plasma cystatin-c and total cholesterol (CT ratio) levels for predicting future low HGS in Europe.

Methods: The data was collected from the Survey of Health, Ageing, and Retirement in Europe (SHARE) between 2015 and 2021-22. The study participants were geriatric adults aged 50 or above (n = 17,698) from 12 European countries. The baseline data in 2015 included the measurements of CT ratio from participants with normal HGS. The participants who developed low HGS in subsequent years were included. We also investigated the quality of life, difficulties performing daily activities, and several comorbidities in the study population.

Results: In a multivariate-adjusted model, male gender, advancing age, poor quality of life, difficulties performing daily activities, and the presence of depression, high blood pressure, diabetes mellitus, Alzheimer's disease, and osteoarthritis were associated with a higher risk of developing low HGS. CT ratio exhibited significant prognostic accuracy for low HGS among men and women aged 60-79, irrespective of the quality of life, degree of depression, difficulties performing daily activities, and the presence of comorbidities, including depression, high blood pressure, diabetes mellitus, Alzheimer's disease, and osteoarthritis.

Conclusion: Collectively, the CT ratio exhibits adequate prognostic accuracy for low HGS, which is not significantly affected by comorbidities and functional limitations. Our findings have clinical and policy implications in timely identifying older adults at risk of developing low HGS.