title: [Factors associated with insufficient birth weight].
abstract: OBJECTIVE
  To identify risk factors for insufficient birth weight, in the Brazilian city of Campinas from the Live Birth Certificates.
  
  
  METHODS
  A cross-sectional study was conducted consulting data from 14,444 Live Birth Certificates from the year 2001. These newborn birth weights ranged from 285g to 5,890g (mean 3,142g), 65.1% of them weighted 3,000g or more, while 25.7% had insufficient weight. A sample of 12,779 term newborn from single pregnancies, with a birth weight > 2,500g was selected. Birth weight was the dependent variable and maternal, pregnancy, delivery and newborn characteristics were the independent variables. Association among variables was assessed by Chi-square test, crude odds-ratio (OR) was calculated. For adjusted odds-ratio (adjOR) values, a logistic regression model was used.
  
  
  RESULTS
  Results showed association between insufficient birth weight and newborn of the female gender (adjOR = 1.57 [95%CI 1.44 - 1.70]), birth from primiparous mothers (adjOR = 1.47 [95%CI 1.35 - 1.60]), inadequate prenatal care (adjOR = 1.42 [95%CI 1.29 - 1.58]) and vaginal delivery (adjOR = 1.23 [95%CI 1.13 - 1.34]).
  
  
  CONCLUSIONS
  The risk for insufficient birth weight was higher for female newborn, offspring of primiparous women, of women who had inadequate prenatal care and had vaginal delivery.
authors.affiliation: Departamento de Pediatria, FCM, Unicamp, Campinas, SP.
authors.forename: Maria Angela Reis de Góes Monteiro
authors.initials: MA
authors.lastname: Antonio
authors.forename: Maria de Lurdes
authors.initials: Mde L
authors.lastname: Zanolli
authors.forename: Emília de Faria
authors.initials: Ede F
authors.lastname: Carniel
authors.forename: André Moreno
authors.initials: AM
authors.lastname: Morcillo
mesh_terms: D001938:Brazil / Q000453:epidemiology; D036861:Delivery, Obstetric / Q000706:statistics & numerical data; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight / Q000502:physiology*; D007231:Infant, Newborn; D050498:Live Birth / Q000453:epidemiology; D008297:Male; D010298:Parity / Q000502:physiology; D011247:Pregnancy; D011295:Prenatal Care / Q000706:statistics & numerical data; D012737:Sex Factors