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Activity Number:
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149
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Type:
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Contributed
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Date/Time:
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Monday, August 4, 2008 : 10:30 AM to 12:20 PM
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Sponsor:
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Section on Survey Research Methods
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| Abstract - #301235 |
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Title:
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Year-to-Year Correlation in National Health Interview Survey Estimates
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Author(s):
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Chris Moriarity*+ and Van Parsons
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Companies:
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National Center for Health Statistics and National Center for Health Statistics
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Address:
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3311 Toledo Road, Hyattsville, MD, 20782,
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Keywords:
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complex sample ; variance estimation ; pooling survey data
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Abstract:
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The National Health Interview Survey (NHIS) is a multi-purpose health survey conducted by the National Center for Health Statistics (NCHS). Public-use microdata files and complex sample design variance estimation structures are available at the NCHS Internet web site. In 2007, NCHS expanded the variance estimation structures to cover all available years of public-use microdata files, which enabled researchers to compute appropriate variance estimates when conducting analyses of NHIS annual data pooled across years. We present research findings about the level of correlation in NHIS estimates from year-to-year, which provide insights in areas such as: 1) the amount of error in variance estimates for pooled data within a sample design period if the annual data are incorrectly assumed to be uncorrelated; 2) the trend in correlation over a sample design period.
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