Ismael Flores Cervantes, MS
Senior Statistician, Westat
Mr. Ismael Flores Cervantes is a Senior Statistician at Westat.
Conducting a Telephone Survey Using an Abs Sample: A Case Study of the California Health Interview Survey
Jennifer Kali
Westat
Ismael Flores Cervantes, MS
Senior Statistician, Westat
Geographically targeting samples in small areas is difficult in telephone surveys with a cell phone component. One solution is to increase the efficiency of targeting telephone surveys to small areas is the use of address-based sampling (ABS), which allows precise targeting of small geographic areas. ABS is best for mail surveys. There has been interest in using ABS as a way to recruit respondents for telephone surveys. A telephone number must be obtained for the sampled addresses, either by matching to the sampled address or requested via a letter mailed to the sample addresses. The California Health Interview Survey (CHIS) is a dual-frame random digit dialing (RDD) telephone survey of the population of California. In 2013-2014, an ABS sample was used to supplement the RDD sample in one county. We describe the CHIS experience with the use of ABS to recruit respondents for a telephone survey targeting a small geographic area. Methods to obtain telephone numbers; data collection outcomes, including response rates, disposition codes, accuracy of the telephone matching; and estimates of health and demographics are compared between the RDD and ABS samples.