Comparison of Influenza Vaccination Rates in Cell-Only, Cell-Mostly, and Landline Households in the National 2009 H1N1 Flu Survey

• Activity Number: 228
• Type: Topic Contributed
• Date/Time: Monday, August 2, 2010 : 2:00 PM to 3:50 PM
• Sponsor: Section on Survey Research Methods
• Author(s): Nicholas Davis*+ and Kennon R. Copeland and Margrethe Montgomery and James A. Singleton
• Companies: NORC and NORC and NORC and National Center for Immunization and Respiratory Diseases
• Keywords: National H1N1 Flu Survey ; telephone Dual Frame Design ; Survey Response Propensity ; Cell-mostly Household

Abstract

The National 2009 H1N1 Flu Survey (NHFS) is a random digit dial (RDD) landline and cellular telephone survey operating from October 2009 through June 2010. Conducted by NORC for the Centers for Disease Control and Prevention, the NHFS tracks H1N1 and seasonal influenza vaccination coverage nationally on a weekly basis. This paper will examine results from the NHFS to detect differences between landline and cellular telephone respondents in vaccination rates, flu-related behaviors, reasons for not getting the vaccine, as well as demographic characteristics. The analysis will attempt to determine to what extent health behaviors differ between respondents from each sample type, accounting for demographics. We also compare estimates from the landline interviews to the combined estimates to gauge the potential bias in landline-only estimates due to under-coverage.