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Activity Number:
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428
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Type:
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Contributed
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Date/Time:
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Wednesday, August 1, 2007 : 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 - #309041 |
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Title:
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Multiyear Estimation for a Single Stratum from the Continuous National Health and Nutrition Examination Survey (NHANES)
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Author(s):
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R. Lee Harding*+ and Jay Clark and Jill M. Montaquila
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Companies:
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Westat and Westat and Westat
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Address:
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1650 Research Blvd, Rockville, MD, 20850,
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Keywords:
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variance estimation ; combined independent samples
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Abstract:
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NHANES is a continuous household survey with nationally representative annual samples. Design-based estimates of rates of health-related outcomes for demographic domains were produced for one major stratum by combining the data across six years of data collection. However, estimating the variance of these domain estimates was problematic because of modifications to the sample design within the major stratum over the period: the number of primary sampling units (PSUs) varied between 19 and 23 across years; the substratification scheme varied; and PSU measures of size were updated. This paper discusses the issues involved in producing estimates and variance estimates for this stratum, and describes the methodology used. Consideration is also given to the production of estimates for other strata, where the numbers of PSUs may be smaller.
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