Key result
Blood urea nitrogen concentration at admission was significantly associated with long-term all-cause mortality in patients with stable angina pectoris (OR 1.077; 95% CI 1.026-1.130; p=0.003).
Why the study?
Elevated blood urea nitrogen indicates renal dysfunction and is linked to increased cardiovascular mortality, but its relationship with long-term all-cause mortality in stable angina pectoris was unclear.
Does blood urea nitrogen concentration at admission predict long-term all-cause mortality in patients with stable angina pectoris undergoing coronary angiography?
Cohort (n=344)
No
Does blood urea nitrogen concentration at admission predict long-term all-cause mortality in patients with stable angina pectoris undergoing coronary angiography?
Odds Ratio: 1.077 (95% CI 1.026–1.13)
p-value: p=0.003
Elevated blood urea nitrogen at admission is a strong independent predictor of long-term all-cause mortality in patients with stable angina pectoris.
Background Elevation of blood urea nitrogen (BUN) indicates renal dysfunction and is associated with increased mortality in cardiovascular diseases. We investigated the relationship between the BUN concentration measured at hospital admission and the long-term all-cause mortality in patients with stable angina pectoris (SAP).Methods The mortality rate of 344 patients who underwent coronary angiography (CAG) in our clinic due to SAP was analyzed during a mean follow-up period of 8 yrs.Results Age (p<0.001), male gender (p=0.020), waist circumference (p=0.007), body-mass index (p=0.002), fasting glucose (p=0.004), BUN (p<0.001), serum creatinine (Cr) (p<0.001), hemoglobin (p=0.015), triglyceride concentrations (p=0.033), and the Gensini score (p<0.001) were related to all-cause mortality as shown by univariate Cox regression analysis. Age (OR 1.056, 95 % CI 1.015-1.100, p=0.008), fasting glucose (OR 1.006, 95 % CI 1.001-1.011, p=0.018), BUN, (OR 1.077, 95 % CI 1.026-1.130, p=0.003), and the Gensini score (OR 2.269, 95 % CI 1.233-4.174, p=0.008) were significantly related with mortality as shown by multivariate Cox regression analysis. According to receiver operating characteristic analysis ofthe sensitivity and specificity of BUN and Cr for predicting mortality, the area under the curve values of BUN and Cr were 0.789 (p<0.001) and 0.652 (p=0.001), respectively. BUN had a stronger relationship with mortality than Cr. A concentration of BUN above 16.1 mg / dl had 90.1 % sensitivity and 60 % specificity for predicting mortality (OR=2.23).Conclusion In patients who underwent CAG due to SAP, the BUN concentration was associated with all-cause mortality during a mean follow-up period of 8 yrs.
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Çetın et al. (2021) conducted a cohort in stable angina pectoris (n=344). Blood urea nitrogen (BUN) concentration was evaluated on all-cause mortality (OR 1.077, 95% CI 1.026-1.130, p=0.003). Blood urea nitrogen concentration at admission was significantly associated with long-term all-cause mortality in patients with stable angina pectoris (OR 1.077; 95% CI 1.026-1.130; p=0.003).
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