Community Hospital wants to compare its hospital-acquired urinary tract infection (UTI) rate for Medicare patients with the national average. The hospital is using the MEDPAR database for its comparison. The MEDPAR database contains 13,000,000 discharges. 200,000 of these individuals were admitted with a principal diagnosis of infectious disease, and 700,000 had a diagnosis of hypertension. Given this information, which of the following would provide the best comparison data for Community Hospital?