title: Excessive weight loss in exclusively breastfed full-term newborns in a Baby-Friendly Hospital.
abstract: OBJECTIVE
  To determine the risk factors for weight loss over 8% in full-term newborns at postpartum discharge from a Baby Friendly Hospital.
  
  
  METHODS
  The cases were selected from a cohort of infants belonging to a previous study. Healthy full-term newborns with birth weight ≥2.000g, who were exclusively breastfed, and excluding twins and those undergoing phototherapy as well as those discharged after 96 hours of life, were included. The analyzed maternal variables were maternal age, parity, ethnicity, type of delivery, maternal diabetes, gender, gestational age and appropriate weight for age. Adjusted multiple and univariate Cox regression analyses were used, considering as significant p<0.05.
  
  
  RESULTS
  We studied 414 newborns, of whom 107 (25.8%) had excessive weight loss. Through the univariate regression, risk factors associated with weight loss >8% were caesarean delivery and older maternal age. At the adjusted multiple regression analysis, the model to explain the weight loss was cesarean delivery (relative risk: 2.27 and 95% of confidence interval: 1.54 to 3.35).
  
  
  CONCLUSIONS
  The independent predictor for weight loss >8% in exclusively breastfed full-term newborns in a Baby-Friendly Hospital was the cesarean delivery. It is possible to reduce the number of cesarean sections to minimize neonatal excessive weight loss and the resulting use of infant formula during the first week of life.
authors.affiliation: Faculdade de Ciências, Universidade Estadual de Campinas (Unicamp), Campinas, SP, Brasil. Electronic address: mezacapa@uol.com.br.
authors.forename: Maria Aparecida
authors.initials: MA
authors.lastname: Mezzacappa
authors.affiliation: Faculdade de Ciências, Universidade Estadual de Campinas (Unicamp), Campinas, SP, Brasil.
authors.forename: Bruna Gil
authors.initials: BG
authors.lastname: Ferreira
mesh_terms: D001942:Breast Feeding; D015331:Cohort Studies; D005260:Female; D006776:Hospitals, Pediatric; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D018570:Risk Assessment; D012307:Risk Factors; D013851:Thinness / Q000453:epidemiology; D015431:Weight Loss
keywords: Amamentação; Breastfeeding; Cesarean section; Cesárea; Newborn; Perda de peso; Recém‐nascido; Weight loss
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