Some NCHS data systems and
surveys are ongoing annual systems while others are conducted periodically. NCHS has two
major types of data systems: systems based on populations, containing data collected
through personal interviews or examinations; and systems based on records, containing data
collected from vital and medical records.
Health
Status Surveys National
Health Interview Survey National Immunization Survey State
and Local Area Integrated Telephone Survey Longitudinal
Studies of Aging National Health and Nutrition Examination Survey NHANES I Epidemiologic Followup Study
National Health Care
Surveys National
Ambulatory Care Survey National Hospital
Ambulatory Care Survey National Hospital Discharge Surgery National Home and Hospice Care Survey National Nursing Home Survey National Nursing Home Survey
Followup
Vital
Statistics National Vital Statistics System National Mortality Followback Survey National
Survey of Family Growth