Abstract
Purpose
To examine whether albumin-to-globulin ratio (AGR) is correlated with long-term mortality in patients with chronic kidney disease (CKD), we performed this study using data from the National Health and Nutrition Examination Survey through 1999–2006.
Methods
3302 CKD patients were included. Patients’ baseline characteristics were collected. Multivariate Cox proportional hazards models were used to investigate the association between AGR and the study outcomes, including long-term all-cause and cardiovascular mortality. Subgroup analysis using the Cox proportional hazards model was performed as a sensitivity test.
Results
During a median follow-up duration of 122.00 months, 1627 (49.27%) deaths were recorded and 440 patients died from cardiovascular disease. In adjusted model 1, AGR ≥ 1.26 group was associated with a lower risk of long-term all-cause mortality HR 0.72, 95% CI 0.65–0.81) compared with AGR < 1.26 group. A similar result was obtained in adjusted model 2. In adjusted model 1, AGR ≥ 1.08 group was associated with a lower risk of long-term cardiovascular mortality (HR 0.59, 95% CI 0.45–0.78) compared with AGR < 1.08 group. In adjusted model 2, there was no significant association between AGR ≥ 1.08 group and a decreased risk of long-term cardiovascular mortality (HR 0.82, 95% CI 0.95–1.12) compared with AGR < 1.08 group. The association of AGR with long-term all-cause mortality differed by gender and age while the association of AGR with long-term cardiovascular mortality differed by age after multivariate adjustment.
Conclusion
AGR is a potential biomarker in risk predictions for long-term mortality in CKD patients, especially in males under age 65.
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Acknowledgements
We thank participants and staff of the NHANES.
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FL and LX designed the study. MZ and YL analysed and interpreted the data. MZ drafted the manuscript. YP and LS revised the manuscript. All authors read and approved the final manuscript.
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NHANES was approved by the NCHS Research Ethics Review Board (ERB) and all participants provided written informed consent. The data of ERB approval can found at the website, https://www.cdc.gov/nchs/nhanes/irba98.htm. The approval numbers are protocol #98–12 for NHANES 1999–2004 and protocol #2005–06 for NHANES 2005–2006. Given it was an analysis of anonymous data, the Central South University Institutional Review Board waived the need for reviewing the study.
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Zeng, M., Liu, Y., Liu, F. et al. Association between albumin-to-globulin ratio and long-term mortality in patients with chronic kidney disease: a cohort study. Int Urol Nephrol 52, 1103–1115 (2020). https://doi.org/10.1007/s11255-020-02453-7
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DOI: https://doi.org/10.1007/s11255-020-02453-7