The data include patient characteristics, reason for visit, diagnoses rendered, diagnostic tests and procedures performed, cause of injury, and medications ordered or provided. The NSAS collects data on patients receiving ambulatory surgery in hospital and free-standing ambulatory surgery centers. Data are abstracted from medical records and include information on procedures, diagnoses, source of payment, and anesthesia. The survey provides statistics about the characteristic of the hospices and home health agencies and the patients they serve. The NHPI provides a comprehensive national listing of health care facilities in the United States, including nursing homes, home health agencies, hospices, and licensed residential care facilities.
Information is collected on services, location, staff, and other characteristics of the facilities.
The NVSS is responsible for the Nation's official vital statistics. These vital statistics are provided through State-operated registration systems. While the registration of these events is a State function, NCHS compiles, analyzes, and publishes national data on births, deaths, fetal deaths, marriages, and divorces. The NCHS Linked Files of Live Birth and Infant Death Records are research files for exploring the complex relationships between infant death and risk factors present at birth. The linked files include information from the birth certificate, such as birth weight, mother's age, and prenatal care, linked to information from the death certificate for the same infant, such as cause of death and age at death.