title: On the reliability and precision of within- and between- population estimates of relative rate parameters.
abstract: Comparisons of individual- and aggregate-level analyses of data from a multigroup observational study are made using an exponential form relative rate model. Stratified, analytic random effects, and aggregate random effects analyses are studied. Estimating equations are developed to give a consistent estimation procedure across analyses and corresponding information matrices are compared. Simulation studies provide insight into the efficiency and bias of relative rate parameter estimates with respect to covariate dispersion, confounding, and covariate measurement error.
authors.affiliation: Department of Biostatistics, University of Washington, Seattle, USA.
authors.forename: L
authors.initials: L
authors.lastname: Sheppard
authors.forename: R L
authors.initials: RL
authors.lastname: Prentice
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000453:epidemiology*; D004041:Dietary Fats; D002149:Energy Intake; D005260:Female; D006801:Humans; D015994:Incidence; D008433:Mathematics; D008875:Middle Aged; D015233:Models, Statistical; D015203:Reproducibility of Results; D014481:United States / Q000453:epidemiology
chemical_list: D004041:Dietary Fats