As a publicly recognized Charter Member of the American Association of Public Opinion Research (AAPOR) Transparency Initiative, the California Health Interview Survey (CHIS) is committed to transparent survey research practice and effective disclosure of research methods.

Each year, CHIS provides documentation describing methodological details of each CHIS data collection and release cycle

Methodology Briefs

concisely address specific methodological issues encountered by CHIS data users. 

Methodology Papers

are products of research projects examining CHIS data quality and innovations. 

Methodology Reports

provide the most in-depth descriptions of CHIS sampling, data collection, data processing, response rates, and weighting and variance estimation methods (five reports per data collection/release cycle).

Select a year to read methodology reports, briefs, and papers, as well as new design features and release notes for each CHIS.