A Review of the Sample Design for the 2001, 2003, and 2005 California Health Interview Survey

• Activity Number: 195
• Type: Contributed
• Date/Time: Monday, August 7, 2006 : 2:00 PM to 3:50 PM
• Sponsor: Section on Survey Research Methods
• Author(s): Ismael Flores Cervantes*+ and Michael E. Jones and Laura Alvarez-Rojas and J. Michael Brick and John H. Kurata and David Grant
• Companies: Westat and Westat and Westat and Westat and University of California, Los Angeles and University of California, Los Angeles
• Keywords: RDD ; health survey ; geographic stratification ; surname list samples ; within-household sampling

Abstract

Sampling procedures used for selecting samples for the California Health Interview Survey (CHIS) are described in this paper. The CHIS telephone survey started in 2001 and continued in 2003 and 2005. The objectives of CHIS were to examine issues in public health and health care and to monitor changes over time for Californians. Each round presented many challenges addressed at the sample design stage. Changes of data user needs and their impact on the sample design are discussed. Methods such as geographic stratification, oversampling of small areas, disproportionate stratified sampling for minority areas, and the use of surname list frames were incorporated into the design. Techniques for increasing telephone dialing efficiency such as purging of nonresidential numbers, oversampling of cases with a matched address, and subsampling of cases for refusal conversion are also discussed.