This 24-month prospective cohort study will examine the frequency and types of adverse events experienced by patients 3-4 weeks after discharge from the Tallahassee Memorial Hospital (TMH), the timeliness of post-discharge ambulatory appointments, and identify the associations, if any, of readily available patient, system, and patient care factors with the occurrence of these post-discharge adverse events. Data collection will involve telephone interviews with patients, and review of inpatient and outpatient health records for services received, as necessary, within 3-4 weeks after discharge from the hospital. These data sources will allow study physicians to implicitly (with some explicit guidance) determine whether an adverse event has occurred, distinguish preventable from ameliorable adverse events, and determine the types of adverse events. In addition, the study will determine the timeliness of post-discharge ambulatory appointments by conducting post-discharge telephone interviews with patients and reviewing health records.