Abstract
Purpose
To examine whether an elevated serum total bilirubin level affects the decline in renal function or new-onset chronic kidney disease (CKD) in patients with type 2 diabetes mellitus (DM2).
Methods
This was a longitudinal observational study in patients who presented at the University of Health Sciences Hospital in Kayseri. Five hundred twenty-nine patients with DM2 who had conserved renal function were enrolled (estimated glomerular filtration rate > 60 ml/min/1.73 m2). Arising CKD stage 3 was the outcome measure. The patients were separated into three groups based on the total serum bilirubin levels. The first group (G1) ranged from 0.1 to 0.3, the second (G2) 0.4–0.5, and the third (G3) 0.6–0.9 mg/dl. The effect of total serum bilirubin levels on CKD 3 development was assessed using Cox proportional hazards regression.
Results
The risk of the CKD stage 3 development was highest in G1 who has the lowest serum total bilirubin levels (G1 vs. G3; hazard ratio [HR], 2.02; 95% confidence interval [CI] 1.21–3.36; p = 0.007). In addition, G2 had a significant risk of CKD stage 3 development (G2 vs. G3; hazard ratio [HR], 1.58; 95% confidence interval [CI] 1.08–2.32; p = 0.018). In the adjusted analysis, compared to G2 and G3, G1 had the highest risk (G1 vs. G3; hazard ratio [HR], 2.20; 95% confidence interval [CI] 1.29–3.77; p = 0.004). Similarly, G2 had a higher risk compared to G3 (hazard ratio [HR], 1.57; 95% confidence interval [CI] 1.05–2.34; p = 0.028).
Conclusions
Serum bilirubin may predict the progression of CKD in patients with type 2 diabetes and preserved kidney function.
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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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Uludag, K., Oguzhan, N., Arıkan, T. et al. Serum bilirubin level and its impact on the progression of chronic kidney disease. Int Urol Nephrol 50, 1695–1701 (2018). https://doi.org/10.1007/s11255-018-1923-9
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DOI: https://doi.org/10.1007/s11255-018-1923-9