An Analysis of Nonresponse Bias Resulting from Nonresolution of Telephone Numbers, Eligibility Screener Nonresponse, and Interview Nonresponse for the National Immunization Survey

• Activity Number: 115
• Type: Contributed
• Date/Time: Monday, July 30, 2007 : 8:30 AM to 10:20 AM
• Sponsor: Section on Survey Research Methods
• Author(s): Benjamin Skalland*+ and Robert Montgomery and Phillip Smith
• Companies: NORC at the University of Chicago and NORC at the University of Chicago and Centers for Disease Control and Prevention
• Keywords: Unit Non-Response ; National Immunization Survey

Abstract

The National Immunization Survey is a nationwide, list-assisted RDD survey conducted by NORC on behalf of the Centers of Disease Control and Prevention. It consists of two phases: a telephone component that seeks to identify households with children aged 19 to 35 months, collect socio-demographic information, and obtain consent to contact the immunization providers for those children; and a provider component wherein questionnaires are mailed to each child's providers seeking immunization data about the child, which are used to estimate vaccination coverage rates. To contribute to the estimates, then, a case must pass through five stages: determination of residential status, eligibility screening, the household interview, consent to contact providers, and provider response. This paper explores the effect of non-response at the first three stages on estimates of vaccination coverage.