Estimated Correlations Among Days for the Combined 1989-91 CSFII. Dietary Assessment Research Series Report 4

Alicia L. Carriquiry, Wayne A. Fuller, J. J. Goyeneche
September 1995  [95-SR 77]

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Suggested citation:

Carriquiry, A.L., W. Fuller, and J. Goyeneche. 1995. "Estimated Correlations Among Days for the Combined 1989-91 CSFII. Dietary Assessment Research Series Report 4." Staff report 95-SR 77. Center for Agricultural and Rural Development, Iowa State University.


Abstract

Data obtained from dietary intake surveys are often used to estimate the proportion of the population with insufficient (or excessive) intake of certain dietary components. The authors present a two-step method for obtaining smooth estimates of day-to-day correlations for nutrient intake, and their standard errors, when dietary data are collected on consecutive days.