title: [Social and biological determinants of infant mortality in population cohort in the city of Passo Fundo, Rio Grande do Sul State].
abstract: One investigated the social and biological determinants of infant mortality of a population cohort of 2,331 live births in the period February 2003 to January 2004, in the city of Passo Fundo, Rio Grande do Sul State, including 56 infant deaths. The databank of deaths had been increased to the databank of the birth cohort, which contained the social and biological variables obtained from live birth certificates and with home interviews. The coefficient of infant mortality of this cohort was 22.8%. Multivariate analyses with logistic regression and hierarchic model had shown that the following aspects were significantly associated with infant death: maternal educational level lower than eight years (RR= 5.7; IC 95%: 1.92-16.75), antecedent of dead children (RR= 3.7 (IC 95%: 1.07-12.10); low birth weight, with RR= 6.7 (IC 95%: 2.07-21.65) to 79.7 (IC 95%:14.36-441.92) for infants of low birth weight and weighing less than 1500g, respectively; Apgar scores < or =7 (RR=8.7; IC 95%: 2.85-26.32) and absence of breastfeeding (RR=15.75; IC 95%: 6.7663.68). As infant mortality in Passo Fundo is socially determined by the low maternal educational level and biologically determined by birth conditions, low birth weight and interruption of breastfeeding, one recommend the inclusion of these factors in the classification of risk for follow up of infant mortality in Passo Fundo.
authors.affiliation: Instituto de Ciências Biológicas, Universidade de Passo Fundo, Passo Fundo, RS, 99010-080. lorena@upf.br
authors.forename: Lorena Teresinha Consalter
authors.initials: LT
authors.lastname: Geib
authors.forename: Cheila Mara
authors.initials: CM
authors.lastname: Fréu
authors.forename: Marlise
authors.initials: M
authors.lastname: Brandão
authors.forename: Magda Lahorgue
authors.initials: ML
authors.lastname: Nunes
mesh_terms: D001034:Apgar Score; D001938:Brazil; D015331:Cohort Studies; D006801:Humans; D007226:Infant Mortality / Q000639:trends*; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D012307:Risk Factors; D012959:Socioeconomic Factors; D014505:Urban Population