• Presentation

Interrupted Telephone Service Adjustment (ITSA) in RDD Telephone Surveys: An Assessment Using the Behavioral Risk Factor Surveillance System (BRFSS)

Citation

Fahimi, M., Trofimovich, L., Levy, P. S., & Wells, H. E. (2006, January). Interrupted Telephone Service Adjustment (ITSA) in RDD Telephone Surveys: An Assessment Using the Behavioral Risk Factor Surveillance System (BRFSS). Presented at Second International Conference on Telephone Survey Methodology, Miami, FL.

Abstract

Exclusion of households without telephone is a source of systematic bias in telephone surveys. While lack of telephone service among households is about five percent nationally, this rate is higher among households of lower levels of socioeconomic status. The following chart shows the extent of this variation as a function of household income, using data from the March Supplement of Current Population Survey (CPS) 2002. As seen, in certain states (Alabama, Georgia, and Louisiana) the percent of nontelephone households for low to moderate income households can exceed 18 percent. On the national level, this percent across all income categories can exceed nine.