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CHIS is a random-digit dial (RDD) telephone survey of households drawn from every county in California. The CHIS sample is representative of the state's non-institutionalized population living in households. CHIS interviews one sample adult in each household. In households with children, CHIS interviews one adolescent age 12-17 and obtains information for one child under age 12 by interviewing the adult who is most knowledgeable about the child.
CHIS covers a wide range of topics, including health status, health conditions, health-related behaviors, health insurance coverage, access to and use of health care services, and the health and development of children and adolescents. Many CHIS questions are adapted from the National Health Interview Survey, other national and state surveys, and individual research projects that focus on population health. In addition, new questions are created to address topics that are unique priorities for each CHIS survey.
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