title: Poisson regression with a surrogate X:  an analysis of vitamin A and Indonesian children's mortality.
abstract: "A Poisson regression model with a surrogate X variable is proposed to help to assess the efficacy of vitamin A in reducing child mortality in Indonesia.  In a recent community trial, the mortality rate in villages receiving vitamin A supplementation was 35% less than in control villages.  However, at base-line, control villages were found to have slightly higher rates of xerophthalmia, an ocular disease caused by vitamin A deficiency.  It was therefore desirable to adjust the mortality comparison for base-line vitamin A levels as indicated by xerophthalmia prevalence.  This paper presents a parametric errors-in-X regression model developed for this purpose.  Likelihood methods for fitting and inference are discussed.  The model is illustrated on the Indonesian data set."
authors.forename: S L
authors.initials: SL
authors.lastname: Zeger
authors.forename: S L
authors.initials: SL
authors.lastname: Edelstein
mesh_terms: D001208:Asia; D001210:Asia, Southeastern; D001695:Biology; D003710:Demography; D003906:Developing Countries; D004194:Disease; D007214:Indonesia; D007226:Infant Mortality; D008722:Methods; D008962:Models, Theoretical; D009026:Mortality; D010827:Physiology; D011153:Population; D011157:Population Dynamics; D012106:Research; D014801:Vitamin A; D014815:Vitamins
chemical_list: D014815:Vitamins; D014801:Vitamin A
keywords: Asia; Biology; Child Mortality; Demographic Factors; Developing Countries; Diseases; Indonesia; Methodological Studies; Models, Theoretical; Mortality; Physiology; Population; Population Dynamics; Research Methodology; Southeastern Asia; Vitamin A; Vitamins