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.
Iowa State University
Carriquiry, Alicia L.; Fuller, Wayne A.; Goyeneche, Juan José; and Jensen, Helen H., "Estimated Correlations Among Days for the Combined 1989-91 CSFII" (1995). CARD Staff Reports. 28.