HCUP Facts and Figures: Statistics on Hospital-based Care in the United States in 2005 presents information derived from the 2005 HCUP Nationwide Inpatient Sample (NIS) with trend information as far back as 1993. This report includes information from the most recent database containing discharge records for all patients treated in a sample of approximately 1,000 hospitals in 2005. These discharges are weighted to represent all inpatient stays in community hospitals across the nation. Community hospitals include all non-federal, short-term acute care hospitals and exclude psychiatric and substance abuse facilities.