A logistic-linear model applied to
Bancroftian filariasis

Fábio Cavalcanti PEREIRA[1]

Gauss Moutinho CORDEIRO1

Gerusa DREYER[2]

Denise MATTOS2

§    ABSTRACT: The generalized linear model is defined by a probability distribution, member of the exponential family of distributions, for the response variable, a set of explanatory variables describing the linear structure of the model and a link function relating the mean response and the linear structure. Bancroftian filariasis is a major public health problem in the tropics with 100 millions of people infected. The aim of this investigation is to study the relationship between the risk of developing fistulation syndrome and several explanatory variables, such as, sex, age, weight, income and an amount of fat on the diet of patients assisted at the Center for Teaching, Research and Tertiary Referral for bancroftian filariasis (NEPAF - Federal University of Pernambuco) in Recife, Brazil. The present study was carried out using the logistic linear models fitted with the software S-PLUS. The study concludes that the probability of patients to have the fistulization syndrome is, approximately, seven bigger when they consume fat above of 400gr/month, when compared with patients who consume fat below of this value.

§    KEYWORDS: Bancroftian filariasis; fistulization syndromes; generalized linear model; logistic model; maximum likelihood.


[1] Departamento de Estatística e Informática, Universidade Federal Rural de Pernambuco – UFRPE, CEP: 52171-900, Recife, PE, Brasil. E-mail: fabio\_ufrpe@hotmail.com / gauss@deinfo.ufrpe.br

[2] Núcleo de Ensino Pesquisa e Assistência em Filariose, Hospital das Clínicas, Universidade Federal de Pernambuco – UFPE, CEP: 50670-910, Recife, PE, Brasil, E-mail: dreyer-g@uol.com.br / mattos.denise@gmail.com