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CHIS constantly seeks to enhance the representativeness of its survey. Beginning in 2007, CHIS includes a sample of cell-phone-only households - often younger and more mobile Californians frequently overlooked in land-line surveys. Such innovations help CHIS users learn more about an important sub-section of California's changing population.

Survey Designs and Methods

Overview
Methodology
Questionnaires
Survey Topics
Sample Design
Data Quality
Frequently Asked Questions

Survey Topics

CHIS covers hundreds of health topics:

CHIS is conducted every two years with many core questions repeated in each survey in order to measure significant shifts over time. New questions are also added each survey year to address emerging concerns that are important for planning and policy development.

Click on any of the following links to see what CHIS topics have changed - and remained the same - over time.

CHIS 2009 Survey Topics (PDF, 646k)
CHIS 2007 Survey Topics (PDF, 190k)
CHIS 2005 Survey Topics (PDF, 254k)
CHIS 2003 Survey Topics (PDF, 303k)
CHIS 2001 Survey Topics (PDF, 76k)