Assessing the Impact of Using a Single-Frame Cell Phone Sample Design for the National Immunization Survey

• Activity Number: 35
• Type: Contributed
• Date/Time: Sunday, August 9, 2015 : 2:00 PM to 3:50 PM
• Sponsor: Survey Research Methods Section
• Author(s): Wei Zeng* and Kirk Wolter and Xian Tao and Elizabeth Ormson and Nadarajasundaram Ganesh and Zhen Zhao and Meena Khare and Laurie Elam-Evans and David Yankey and Jenny Jeyarajah and Holly A. Hill
• Companies: NORC at the University of Chicago and NORC at the University of Chicago and NORC at the University of Chicago and NORC at the University of Chicago and NORC at the University of Chicago and CDC and National Center for Health Statistics and CDC and CDC and CDC and CDC
• Keywords: Cell-phone sample ; dual-frame sample design ; National Immunization Survey ; dual-frame sample design ; single-frame sample design ; Weighting

Abstract

The National Immunization Survey (NIS), a dual-frame landline and cell-phone survey, monitors vaccination coverage among children 19-35 months and teens 13-17 years in 56 state and local areas. Given the increasing prevalence of cell-phone use and declining prevalence of landline-only households among young families with children, a single-frame cell-phone sample design may be a viable option for the NIS. We used 2012-13 NIS data to evaluate the area-level impact of using a single-frame cell-phone sample design. We compared the single-frame and dual-frame sample designs in terms of vaccination coverage estimates and key survey indicators. We identified factors associated with significant differences in estimated vaccination coverage rates between the dual-frame and single-frame sample designs. Potential factors that we considered included cell-phone-only rates in the area and geographic inaccuracies associated with the cell-phone sample. Finally, we assessed whether changing to a single-frame design has similar impact on estimated vaccination coverage among children 19-35 months and teens 13-17 years. Findings will provide guidance for future NIS surveys.