California Health Interview Survey: Meeting the demand for population-based health data on AA NHPIs

Since 2001, the California Health Interview Survey (CHIS) has collected health and important socio-demographic information on over 30,000 Asian Americans (AA) and over 1600 Native Hawaiians and Pacific Islanders (NHPI) in California.  CHIS is the largest omnibus population-based state health survey in the country, now in its 7^th cycle.  For each cycle, CHIS collects information on 50,000 or more adults, teenagers and children, via landline or cellphone interview (since 2007).   CHIS is viewed as California’s critical data source on health status, health conditions, health insurance coverage, access to health care and health behaviors.    It is one of the first large-scale health surveys to interview in Cantonese, Mandarin, Korean, Vietnamese, Khmer (2001), and Tagalog (beginning in 2014), in addition to English and Spanish.   CHIS augments its random digit-dial approach with geographic targeting of surname list sample to oversample Koreans and Vietnamese. As a national model in facilitating population-based Asian subgroup estimates, CHIS continues to innovate and is currently considering cost-effective approaches to increasing the sample yield for NHPI populations.  This talk will describe CHIS as a proof-of-concept in developing a diverse AA sample, and discuss potential research approaches to improve estimates for the NHPI population, specifically, address-based sampling, respondent-driven sampling, list-assisted samples and small domain estimation.