Abstract #301640

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JSM 2003 Abstract #301640
Activity Number: 16
Type: Contributed
Date/Time: Sunday, August 3, 2003 : 2:00 PM to 3:50 PM
Sponsor: Section on Health Policy Statistics
Abstract - #301640
Title: Poststratification and Weighting in the Analysis of Opinion Surveys on Health Issues for Public Health Communication Planning
Author(s): William E. Pollard*+
Companies: Centers for Disease Control and Prevention
Address: 2554 Circlewood Rd. NE, Atlanta, GA, 30345-1958,
Keywords: health opinion surveys ; public health communication planning
Abstract:

Poststratification is a commonly used procedure in the analysis of national survey data. This involves the postsurvey adjustment of sample weights of respondents so that totals in demographic categories match known population totals. While the principles of proportionate sampling in the design of surveys are generally understood by users of survey data and findings, the principles of this postsurvey adjustment are less well known by users. Poststratification weighting can reduce bias due to nonresponse and sampling frame noncoverage, and can enhance consistency and comparability across different surveys that are poststratified to the same population. In this presentation, the basic ideas of poststratification are described, and the benefits, as well as the limitations, of its use are discussed. References to the literature are provided. The main points are illustrated with analyses of national survey data used for public health communication planning.

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