Abstract
BackgroundSpontaneous bacterial peritonitis (SBP) is a common and life-threatening infection in patients with advanced cirrhosis. The prognostic value of a novel marker, the delta neutrophil index (DNI), was investigated relative to mortality in patients with SBP.Materials & MethodsSeventy-five patients with SBP were studied from April 2010 to May 2012. DNI at initial diagnosis of SBP was determined and compared with 30-day mortality rates.ResultsOf the patients, 87.7% were men, and the median age of all patients was 59.0 yrs. The area under the receiver-operating characteristic (ROC) curve of DNI for 30-day mortality was 0.701 (95% confidence interval [CI], 0.553–0.849; p = 0.009), which was higher than that of C-reactive protein (0.640, 95% CI, 0.494–0.786; p = 0.076) or the model for end-stage liver disease score (0.592, 95% CI, 0.436–0.748; p = 0.235). From the ROC curve, with the sum of sensitivity and specificity, the cutoff value of DNI was determined to be 5.7%. In the high-DNI group (DNI ≥5.7%), septic shock and 30-day mortality were more prevalent compared with the low-DNI group (84.2% vs. 48.2%, p = 0.007; 57.9% vs. 14.3%, p<0.001, respectively). Patients with an elevated DNI had a higher risk of 30-day mortality compared with those with a low DNI (4.225, 95% CI, 1.631–10.949; p = 0.003).ConclusionA higher DNI at the time of SBP diagnosis is an independent predictor of 30-day mortality in patients with SBP.
Highlights
In patients with advanced cirrhosis, spontaneous bacterial peritonitis (SBP) is a common and life-threatening infection that requires prompt recognition and treatment
The area under the receiveroperating characteristic (ROC) curve of delta neutrophil index (DNI) for 30-day mortality was 0.701 (95% confidence interval [confidence intervals (CIs)], 0.553–0.849; p = 0.009), which was higher than that of C-reactive protein (0.640, 95% CI, 0.494–0.786; p = 0.076) or the model for endstage liver disease score (0.592, 95% CI, 0.436–0.748; p = 0.235)
Patients with an elevated DNI had a higher risk of 30-day mortality compared with those with a low DNI (4.225, 95% CI, 1.631–10.949; p = 0.003)
Summary
In patients with advanced cirrhosis, spontaneous bacterial peritonitis (SBP) is a common and life-threatening infection that requires prompt recognition and treatment. It is characterized by the presence of .250 polymorphonuclear cells (PMN)/mm in ascites in the absence of an intra-abdominal source of infection [1,2]. Despite advances in the knowledge of bacterial cirrhosis pathogenesis and developments of appropriate treatment strategies, the mortality rate of SBP remains at 20% [3,4,5]. For patients with cirrhosis, the prognostic capabilities of conventional parameters such as systemic inflammatory response syndrome (SIRS) and C-reactive protein (CRP) are relatively limited [6]. Spontaneous bacterial peritonitis (SBP) is a common and life-threatening infection in patients with advanced cirrhosis. The prognostic value of a novel marker, the delta neutrophil index (DNI), was investigated relative to mortality in patients with SBP
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