Decreasing Hospitalization and In-hospital Mortality Related to Cholangitis in the United States

Objectives: The aim of this study was to determine trends in hospitalization rates and in-hospital mortality of cholangitis and also determine predictive factors of in-hospital mortality. Methods: The Nationwide Inpatient Sample database was utilized for inpatient data analysis from 1988 to 2006. Patients with primary cholangitis International Classification of Diseases, ninth revision, Clinical Modification (ICD-9-CM) discharge diagnosis were included. Age-adjusted procedure rates for endoscopic retrograde cholangiopancreatography (ERCP) with biliary stent placement and sphincterotomy were also analyzed. Analysis of variance was used to evaluate trends, and linear Poisson multivariate regression model was used to control for variations in age, sex, time of diagnosis, and ethnicity. Logistic regression analysis was performed to determine predictive factors of in-hospital mortality. Results: The age-adjusted hospitalization rate of cholangitis decreased 24.8% from 2.34 per 100,000 in 1988 to 1.76 per 100,000 in 2006 (P < 0.01). The age-adjusted in-hospital mortality of cholangitis increased 9.2% from 165.0 to 181.6 per 100,000 from 1988 to 1998 (P < 0.01), and then declined 73% to 48.9 per 100,000 in 2006 (P < 0.01). The age-adjusted procedure rates for ERCP with biliary stenting increased from 0.55 to 15.23 per 100,000 from 1988 to 2006 (P < 0.01), as did the age-adjusted rates for ERCP with sphincterotomy from 1.06 to 35.64 per 100,000 (P < 0.01). Conclusions: The hospitalization rate of cholangitis has been declining over the past 2 decades. The overall trend in mortality peaked in 1998 and has shown a subsequent decline that may in part be related to increased utilization of endoscopic biliary decompression.