The California Health Interview Survey (CHIS) is primarily a Random Digit Dial (RDD) telephone survey of over 51,000 households. Based on a stratified sample design, the original planning used a combination of 1998 CPS data and 1990 Census data to estimate the numbers and proportions of California’s ethnic and racial subgroups, non-English language demands, and expected numbers of adolescents and young children across 41 geographic strata. This information was also critical to planning for specific over-sampling of Japanese, Vietnamese, Korean, Asian Indian, Cambodian and American Indian and Alaska Native populations. It was also the basis for a decision that it would not be necessary to over-sample California’s Chinese and Filipino populations. At the mid-point of actual data collection, 2000 Census data were released giving CHIS planners an opportunity to readjust these estimates and better assess the actual response of all these groups in the RDD portion of the survey. This presentation will show how well the RDD survey did in reflecting the current population as compared to both the 2000 Census data and the original estimates. More importantly, it will be shown that the added dimension of the completed over-samples gives CHIS very good sample sizes for analytical purposes thus meeting the objectives of the original sample design.
Learning Objectives: The California Health Interview Survey (CHIS) is a large population-based assessment of health and health care access designed to provide estimates at the local level and for California's ethnically diverse population. This session will provide information on the use of CHIS data to measure health disparities based on race/ethnicity, income, age, gender and sexual orientation, immigration status and citizenship, and geography, including urban-rural place of residence. Presenters will describe scientific and political factors involved in the development of CHIS; the design of the 55,000 household CHIS sample; methods of assuring quality of health, health insurance, access, and other measures; methods of multicultural and linguistic adaptation of survey measures; confidentiality protection policies; and the dissemination of data and results to diverse users.
Keywords: Population, Health Care Access
Presenting author's disclosure statement:
Organization/institution whose products or services will be discussed: None
I do not have any significant financial interest/arrangement or affiliation with any organization/institution whose products or services are being discussed in this session.