Abstract

Early readmissions of spontaneous bacterial peritonitis (SBP) are often associated with poor outcomes. We compared characteristics and outcomes for index and 30-day readmissions of SBP in the USA. We analyzed the Nationwide Readmissions Database for 2018 to identify all adult (≥18years) 30-day readmissions of SBP in the USA. Hospitalization characteristics and outcomes for index and 30-day readmissions of SBP were compared. Independent predictors of 30-day readmissions were also identified. In 2018, of the 5,797 index admissions for SBP, 30% (1726) were readmitted within 30day. At the time of readmission, the most common admitting diagnosis was alcoholic cirrhosis of the liver with ascites (11.8%) followed by sepsis due to an unspecified organism (9.2%). SBP as an admitting diagnosis was identified for only 8.3% of these 30-day readmissions. Compared with index admissions, 30-day readmissions of SBP had a lower mean age (56.1 vs 58.6years, P<0.001) without a statistically significant difference for gender. Furthermore, 30-day readmissions of SBP were associated with significantly higher odds of inpatient mortality (10% vs 4.9%, OR: 2.15, 95% CI: 1.66-2.79, P<0.001), and mean total hospital charge ($85,031 vs $56,000, mean difference: 29,032, 95% CI: 12,867-45,197, P<0.001) compared with index admissions. The presence of chronic pulmonary disease, liver failure, inpatient dialysis, and discharge against medical advice were identified as independent predictors for increased 30-day readmissions of SBP. The 30-day readmission rate of SBP was 30% and these readmissions were associated with higher odds of inpatient mortality compared with index admissions.

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