Predictors and Outcomes of Acute Respiratory Failure in hospitalized Acute Pancreatitis Patients

This is a retrospective cohort study using the Nationwide Inpatient Sample (NIS) database from the year 2005 to 2014. The NIS is the largest publicly available all-payer inpatient database in the United States, which contains data from up to 46 participating States comprising of almost 1,000 hospitals. It consists of 20% stratified sample of all discharges from the participating hospitals and contains data on more than 8 million discharges per year. Each discharge is treated as a unique entry and is coded with one primary discharge diagnosis and up to 25 secondary diagnoses as well as 15 associated procedures coded using the International Classification of Diseases, Clinical Modification, ninth edition (ICD-9-CM Codes). The NIS is maintained as part of the Healthcare Cost and Utilization Project of the Agency for Healthcare Research and Quality.