title: [Pre-pregnancy nutritional status, maternal weight gain, prenatal care, and adverse perinatal outcomes among adolescent mothers].
abstract: OBJECTIVE
  To identify the association between pre-gestational nutritional status, maternal weight gain, and prenatal care with low birth weight (LBW) and prematurity outcomes in infants of adolescent mothers.
  
  
  METHODS
  Cross-sectional study with 542 pairs of adolescent mothers and their children attending a public maternity hospital in Rio de Janeiro. Data were collected from medical records. To determine the association between independent variables and the outcomes studied, odds ratio (OR) and a 95% confidence interval (CI) were estimated
  
  
  RESULTS
  With respect to pre-pregnancy nutritional status of adolescents, 87% had normal weight, 1% were underweight, 10% were overweight, and 2% obese. Inadequate total gestational weight gain (72%) exceeded adequacy (28%). Birth weight was favored with greater gestational weight gain, and reduced with late onset of prenatal care. The comparison between the low birth weight and normal birth weight groups revealed significant differences between variable means: interval between the past pregnancy and current pregnancy (p = 0.022), pre-gestational weight (p = 0.018); pre-gestational body mass index (p < 0.001), and total gestational weight gain (p = 0.047). The odds of LBW (OR 2.70, 95% CI 1.45 to 5.06) and prematurity (OR 5.82, 95% CI 3.10 to 10.92) fell when the adolescent received six or more prenatal visits.
  
  
  CONCLUSIONS
  Birth weight was associated with inter-gestational interval, pre-pregnancy weight and body mass index before pregnancy. The minimum frequency of six prenatal care visits was a protective factor against LBW and prematurity.
authors.affiliation: Programa de Pós-Graduação em Nutrição, Instituto de Nutrição Josué de Castro, UFRJ. marta@nutricao.ufrj.br
authors.forename: Marta Maria Antonieta de Souza
authors.initials: MM
authors.lastname: Santos
authors.forename: Mirian Ribeiro
authors.initials: MR
authors.lastname: Baião
authors.forename: Denise Cavalcante
authors.initials: DC
authors.lastname: de Barros
authors.forename: Alessandra de Almeida
authors.initials: Ade A
authors.lastname: Pinto
authors.forename: Priscila La Marca
authors.initials: PL
authors.lastname: Pedrosa
authors.forename: Claudia
authors.initials: C
authors.lastname: Saunders
mesh_terms: D000293:Adolescent; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007234:Infant, Premature; D009752:Nutritional Status; D011247:Pregnancy; D011256:Pregnancy Outcome; D011295:Prenatal Care; D015430:Weight Gain; D055815:Young Adult