title: Breastfeeding duration and exclusivity associated with infants' health and growth: data from a prospective cohort study in Bavaria, Germany.
abstract: OBJECTIVE
  To investigate the relationship between breastfeeding and infant health and to describe growth in the first 9 months.
  
  
  METHODS
  Mothers delivering a baby in April 2005 were recruited throughout Bavaria, Germany, for a prospective birth cohort study. These mothers reported breastfeeding data, health and growth data of 1901 infants assessed by a physician in questionnaires on day 2-6, and in months 2, 4, 6 and 9. Subjects were healthy term infants with a birth weight > or =2500 g. We compared 475 infants breastfed exclusively for > or =6 months (group A), 870 infants breastfed fully/exclusively > or =4 months, but not exclusively > or =6 months (group B) and 619 infants not breastfed/breastfed <4 months (group C).
  
  
  RESULTS
  In multivariate analysis > or =6 months of exclusive breastfeeding reduced significantly the risk for > or =1 episode of gastrointestinal infection(s) during months 1-9 compared to no/<4 months breastfeeding (adjusted odds ratio [OR]: 0.60; 95% confidence interval [CI]: 0.44-0.82). The application of the World Health Organization (WHO)-child growth standards showed lower weight-for-length z-scores in first days of life in group C versus groups A and B, whereas in months 6/7 group C showed the highest scores.
  
  
  CONCLUSIONS
  Differences in child growth depending on breastfeeding duration should be investigated further. Concerning health outcomes our findings support the recommendation for > or =6 months of exclusive breastfeeding.
authors.affiliation: Department of Environmental Health, Bavarian Health and Food Safety Agency, Veterinaerstrasse 2, 64 Oberschleissheim, Germany. Barbara.Rebhan@lgl.bayern.de
authors.forename: Barbara
authors.initials: B
authors.lastname: Rebhan
authors.forename: Martina
authors.initials: M
authors.lastname: Kohlhuber
authors.forename: Ursula
authors.initials: U
authors.lastname: Schwegler
authors.forename: Hermann
authors.initials: H
authors.lastname: Fromme
authors.forename: Michael
authors.initials: M
authors.lastname: Abou-Dakn
authors.forename: Berthold V
authors.initials: BV
authors.lastname: Koletzko
mesh_terms: D001942:Breast Feeding / Q000453:epidemiology*; D002657:Child Development; D015331:Cohort Studies; D005260:Female; D005858:Germany / Q000453:epidemiology; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011446:Prospective Studies; D013997:Time Factors