Univariate and multivariable association of AP (all-diagnoses) with demographic parameters.

aUnivariate models were constructed using regression analysis of cases with acute pancreatitis based on individual covariates only.
bMultivariable models were constructed using regression analysis of cases with AP based on interaction with both comorbid conditions and demographic parameters (age, sex, race, hospital region, median household income, payer type, and year of discharge).