Abstract
Background and aim
A decreased estimated glomerular filtration rate (eGFR) is associated with frailty, but the association between kidney function and frailty using multidimensional assessments has not been entirely examined. We aimed to investigate whether albuminuria and the eGFR using different biomarkers were associated with frailty.
Methods
A total of 1830 older adults were included. Kidney function was assessed by the eGFR (based on combined creatinine-cystatin C [eGFRcr-cys]) and β2-microglobulin [eGFRB2M]) and urine albumin-creatinine ratio (UACR). Frailty was measured by the Fried phenotype (FP) and frailty index (FI). Logistic regression models were used to investigate cross-sectional and longitudinal associations of baseline kidney measures with prevalent and incident frailty.
Results
At baseline, kidney function was associated with prevalent frailty. During the 2-year follow-up, a decreased eGFR (per 10 units) was associated with an increased risk of incident frailty using the FP (eGFRcr-cys: OR 1.18, 95% CI 1.03–1.35; eGFRB2M: OR 1.14, 95% CI 1.02–1.29, respectively) and FI (eGFRB2M: OR 1.18, 95% CI 1.04–1.65). An increased logUACR was associated with a higher risk of incident frailty using the FP (OR 1.18, 95% CI 1.03–1.35). Additionally, individuals with chronic kidney disease (CKD) had a higher risk of incident frailty using the FP (eGFRcr-cys: OR 2.13, 95% CI 1.28–3.47; eGFRB2M: OR 1.58, 95% CI 1.10–2.29, respectively) and FI (eGFRcr-cys: OR 1.97, 95% CI 1.15–3.32; eGFRB2M: OR 1.51, 95% CI 1.03–2.24, respectively).
Conclusion
Kidney function decline and CKD were associated with an increased risk of prevalent and incident frailty in older adults. Physicians should pay more attention to monitoring frailty status in older adults with CKD, even in those with kidney function decline.
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Acknowledgements
We acknowledge all participants involved in the present study from the RuLAS. We acknowledge the support from the government of Rugao, the Public Health Bureau of Jiang’an Township and Rugao city, the Bureau of Civil Affairs, the Rugao People’s Hospital and Human Phenome Institute, Fudan University, Shanghai, China.
Funding
This work was supported by grants from the National Key R&D Program of China (2018YFC2000400, 2018YFC2000400-3, 2018YFC2002000), the Shanghai Clinical Research Center for Aging and Medicine (19MC1910500), and Shanghai Municipal Science and Technology Major Project (2017SHZDZX01).
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ZH, SX and WXF: design research; ZH, LY, HM, JX, WM and CJ: conducted the research; ZH, LY and HM: analyzed the data, performed the tactical analyses. ZH and SX: wrote the paper; ZH and SX: had primary responsibility for the final content; and all authors read and approved the final manuscript.
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Zhang, H., Hao, M., Li, Y. et al. Glomerular filtration rate by different measures and albuminuria are associated with risk of frailty: the Rugao Longitudinal Ageing Study. Aging Clin Exp Res 34, 2703–2711 (2022). https://doi.org/10.1007/s40520-022-02245-2
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DOI: https://doi.org/10.1007/s40520-022-02245-2