California Health Interview Survey


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 CHIS is an AAPOR TI Charter Member


CHIS is publicly recognized as a Charter Member of the AAPOR Transparency Initiative. The certification signifies a commitment to transparent survey research practice and effective disclosure of research methods.

CHIS Webinars

Learn how to understand and use CHIS data with our free webinars.

Browse all Center videos here.

CHIS Methodology Explained

Download detailed methodology reports, briefs, and technical papers.

See the questions we ask and access technical documents. See what health topics we investigate each cycle.

Learn about the CHIS sample and view sample sizes by county, race, and ethnicity.

Understand how CHIS maintains the high quality of its data.