Utility of the blood urea nitrogen to serum albumin ratio as a prognostic factor of mortality in aspiration pneumonia patients

This study aimed to determine whether the blood urea nitrogen to serum albumin (B/A) ratio is a useful prognostic factor of mortality in patients with aspiration pneumonia. The study included patients with aspiration pneumonia who had been admitted to our hospital via the emergency department (ED) b...

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Bibliographic Details
Published in:The American journal of emergency medicine 2021-05, Vol.43, p.175-179
Main Authors: Ryu, Seung, Oh, Se kwang, Cho, Sung Uk, You, Yeonho, Park, Jung Soo, Min, Jin Hong, Jeong, Wonjoon, Cho, Yong chul, Ahn, Hong Joon, Kang, Changshin
Format: Article
Language:English
Subjects:
Age
Albumin
Aspiration pneumonia
Blood
Blood levels
Blood urea nitrogen
C-reactive protein
Comorbidity
Creatinine
Dehydrogenases
Disease
Electronic health records
Emergency medical care
Hospitals
Kidneys
Laboratories
Medical prognosis
Medical records
Mortality
Nitrogen
Patients
Pneumonia
Proteins
Regression analysis
Respiration
Software
Urea
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Summary:This study aimed to determine whether the blood urea nitrogen to serum albumin (B/A) ratio is a useful prognostic factor of mortality in patients with aspiration pneumonia. The study included patients with aspiration pneumonia who had been admitted to our hospital via the emergency department (ED) between January 1, 2014 and December 31, 2018. The 28-day mortality after the ED visits was the primary end point of this study. The data of the survivors and non-survivors were compared. A final diagnosis of aspiration pneumonia was made for 443 patients during the study period. Significant differences were observed in age, respiratory rate, albumin levels, total protein levels, blood urea nitrogen levels, C-reactive protein levels, glucose, and Charlson comorbidity index scores between the survivor and non-survivor groups. Moreover, the B/A ratio was significantly higher in the non-survivor group than that in the survivor group. The area under the curve for the B/A ratio was 0.70 [95% confidence interval (CI) 0.65–0.74], 0.71 for the PSI (95% CI 0.67–0.76), 0.64 for CURB-65 (95% CI 0.60–0.69), and 0.65 for albumin (95% CI 0.60–0.70) on the receiver operating characteristic curve for predicting mortality within 28 days of the ED visit. Multivariable logistic regression analysis revealed that the B/A ratio (>7, OR 3.40, 95% CI 1.87–6.21, P 
ISSN:0735-6757
1532-8171
DOI:10.1016/j.ajem.2020.02.045