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.
Methodology Reports 2023
- Report 1: 2023 Sample Design
- Report 2: 2023 Data Collection Methods
- Report 3: 2023 Data Processing Procedures
- Report 4: 2023 Response Rates
- Report 5: 2023 Weighting and Variance Estimation
Methodology Papers 2023
- What's New in CHIS 2021-2022
- CHIS 2022 Release Notes/Errata
- Revised CHIS 2021 Release Notes/Errata (October 4, 2023)
- CHIS 2021 Release Notes/Errata (October 5, 2022)
Methodology Reports 2021-2022
- Report 1: 2021-2022 Sample Design
- Report 2: 2021-2022 Data Collection Methods
- Report 3: 2021-2022 Data Processing Procedures
- Report 4: 2021-2022 Response Rates
- Report 5: 2021-2022 Weighting and Variance Estimation
Methodology Papers 2021–2022
- Changes to the CHIS 2019–2020 Methodology
- What's New in CHIS 2019–2020
- CHIS 2020 Release Notes/Errata
- CHIS 2019 Release Notes/Errata
Updated with Version 2.0 on 9/22/2021
Methodology Reports 2019–2020
- Report 1: 2019–2020 Sample Design
- Report 2: 2019–2020 Data Collection Methods
- Report 3: 2019–2020 Data Processing Procedures
- Report 4: 2019–2020 Response Rates
- Report 5: 2019–2020 Weighting and Variance Estimation
Methodology Papers 2019–2020
- CHIS 2019–2020 Redesign: Rationale, Empirical Evaluation, and Trends
- CHIS 2019–2020 Redesign Appendix: Adult Subgroup Trend Analysis
- Innovative Methods to Increase Child Interviews in the California Health Interview Survey
- How Changing Survey Mode Impacts Measures of Tobacco and E-cigarette Use
- Understanding Factors Impacting Parental Permission in Surveying Adolescents
- The Importance of Leveraging a Parents Influence in ABS Push-to-Web Survey of Adolescents
- Spring 2018 address-based sampling mail push-to-web field experiment
- Fall 2018 address-based sampling mail push-to-web statewide pilot experiment
Methodology Reports 2017–2018
Methodology Reports 2015–2016
Methodology Reports 2003
- Report 1: 2003 Sample Design
- Report 2: 2003 Data Collection Methods
- Report 3: 2003 Data Processing Procedures
- Report 4: 2003 Response Rates
- Report 5: 2003 Weighting and Variance Estimation
Methodology Briefs 2003
Methodology Papers 2003
Methodology Reports 2001
- Report 1: 2001 Sample Design
- Report 2: 2001 Data Collection Methods
- Report 3: 2001 Data Processing Procedures
- Report 4: 2001 Response Rates
- Report 5: 2001 Weighting and Variance Estimation
- Report 5 (supplement): 2001 Revised Weights
Methodology Briefs 2001
Methodology Papers 2001