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Blood Urea Nitrogen-to-Albumin Ratio Predicts 28-Day Mortality in ICU Patients with CKD: Study

Dr. Shravani DaliWritten by Dr. Shravani Dali Published On 2025-07-07T21:00:48+05:30  |  Updated On 7 July 2025 9:00 PM IST
Blood Urea Nitrogen-to-Albumin Ratio Predicts 28-Day Mortality in ICU Patients with CKD: Study
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Researchers have found in a new study that Blood Urea Nitrogen-to-Albumin Ratio (BAR) shows a significant association with 28-day mortality risk in ICU patients suffering from chronic kidney disease (CKD), highlighting its potential as a valuable tool for mortality risk stratification.

Chronic kidney disease (CKD) is prevalent worldwide, with patients facing significant mortality risk in intensive care units (ICUs). Early identification of high-risk CKD patients is crucial for improving clinical outcomes. The blood urea nitrogen to albumin ratio (BAR) is a simple and measurable indicator, but its relationship with 28-day mortality in CKD patients is not well established. This study aimed to investigate this association. They conducted a retrospective analysis of eligible CKD patients from the MIMIC IV database. The association between the BAR and 28-day mortality was assessed using Kaplan-Meier survival curves, multivariable Cox regression models, and restricted cubic spline models. Results: A total of 4,625 patients were included, with a 28-day mortality rate of 25.2%. Kaplan-Meier survival curve analysis indicated that patients in the high BAR tertile had significantly lower survival probabilities than those in the low BAR tertile. The adjusted Cox regression model showed that compared to low BAR patients (T1 ≤ 9.8 mg/g), those in T2 (10.0-17.4 mg/g) and T3 (≥ 17.5 mg/g) had increased risks of 28-day mortality, with HRs of 1.49 (95% CI: 1.26–1.76) and 2.04 (95% CI: 1.73–2.40), respectively. Restricted cubic spline analysis indicated a nonlinear association. The BAR is significantly associated with 28-day mortality risk in ICU patients with CKD and may serve as a valuable tool for mortality risk stratification.


Reference:

He, K., Zhu, Y., Wang, W. et al. Association between the blood urea nitrogen to serum albumin ratio and the risk of mortality in patients with chronic kidney disease: a cohort study. BMC Nephrol 26, 275 (2025). https://doi.org/10.1186/s12882-025-04214-z

Keywords:

Blood, Urea, Nitrogen-to-Albumin, Ratio, Predicts, 28-Day, Mortality, ICU Patients, CKD, Study, He, K., Zhu, Y., Wang, W.




BloodUreaNitrogen-to-AlbuminRatioPredicts28-DayMortalityICU PatientsCKDStudy
Source : BMC nephrology
Dr. Shravani Dali
Dr. Shravani Dali

    Dr. Shravani Dali has completed her BDS from Pravara institute of medical sciences, loni. Following which she extensively worked in the healthcare sector for 2+ years. She has been actively involved in writing blogs in field of health and wellness. Currently she is pursuing her Masters of public health-health administration from Tata institute of social sciences. She can be contacted at editorial@medicaldialogues.in.

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