No weekend effect on outcomes of severe acute pancreatitis in Japan: data from the diagnosis procedure combination database

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Abstract
Background In the early phase of severe acute pancreatitis, timely multidisciplinary management is required to reduce mortality. The aim of this observational study was to evaluate the impact of weekend hospital admission on outcomes using population-based data in Japan. Methods Data on adult patients (≥20 years) with severe acute pancreatitis were extracted from a nationwide Japanese administrative database covering over 1000 hospitals. In-hospital mortality, length of stay, and total costs were compared between weekend and weekday admissions, with adjustment for disease severity according to the current Japanese severity scoring system for acute pancreatitis, and other potential risk factors. Results In total, 8328 patients hospitalized during the study period 2010–2013 were analyzed (2242 admitted at weekends and 6086 on weekdays). In-hospital mortality rates were not significantly different: 5.9 vs. 5.4 % for weekend and weekday admissions, respectively (multivariate-adjusted odds ratio, 1.06; 95 % confidence interval, 0.83–1.35). The impact of weekend admission was not significant either for length of hospitalization (median, 18 vs. 19 days) and total costs (median, 6161 vs. 6233 US dollars) (both p > 0.19 in multivariate-adjusted linear regression). The rates of, and time to, specific treatments were also similar between patients with weekend and weekday admissions. Conclusions A weekend effect in severe acute pancreatitis admissions was not evident. Adjustments to weekend staffing and selective hospital referral of patients admitted at weekends are not indicated for severe acute pancreatitis in current clinical practice in Japan.
Funding Information
  • The Ministry of Health, Labour and Welfare, Japan (H27-Policy-Designated-009 and H27-Policy-Strategy-011)

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