title: [Supplementary feeding of infants in a developed city within the context of a developing country].
abstract: OBJECTIVE
  To establish the timing for introducing supplementary foods in the diet of infants from the city of Campinas, state of São Paulo, Brazil.
  
  
  METHODS
  This cross-sectional study included 2 857 children younger than 2 years of age randomly selected from the city department of health live birth database between 2004 and 2005. The mothers answered a questionnaire that included 87 closed questions designed to collect information concerning socioeconomic status, breastfeeding, and timing of introduction of supplementary foods.
  
  
  RESULTS
  Assessment of the mothers revealed that 13.5% were adolescents, 73.1% had completed elementary or high school education, 45.9% had technical level jobs, 6,7% had jobs requiring a university degree, and 2.7% were health professionals. On average, participants belonged to socioeconomic class C (ranging from A, highest, to E, lowest), but all socioeconomic classes were represented. The median duration of exclusive breastfeeding was 90 days (95%CI: 87.6-92.4). Water (95%CI: 118.6-121.4) and tea (95 CI%: 113.2-126.8) were introduced at a median of 120 days. Semi-solid foods (95%CI: 178.6-181,4) and powdered milk (95%CI: 169.0-191.0) were introduced at a median of 180 days. Powdered milk and soft drinks had been ingested by 39.1% and 2.1%, respectively, at 4 months, and by 63.2 and 69.1%, respectively, at 1 year of age. Shorter breastfeeding duration was observed for women with technical level jobs, those who were unemployed, and those without a partner.
  
  
  CONCLUSIONS
  The median duration of exclusive breastfeeding was far from that recommended due to the offer of supplementary fluids. Supplementary foods were introduced precociously, especially sweets.
authors.affiliation: Departamento de Pediatria, Faculdade de Ciências Médicas, Universidade Estadual de Campinas, Campinas, SP, Brasil.
authors.forename: Julia Laura Delbue
authors.initials: JL
authors.lastname: Bernardi
authors.forename: Regina Esteves
authors.initials: RE
authors.lastname: Jordão
authors.forename: Antônio Azevedo
authors.initials: AA
authors.lastname: Barros Filho
mesh_terms: D000293:Adolescent; D000328:Adult; D001938:Brazil; D003430:Cross-Sectional Studies; D003906:Developing Countries; D005260:Female; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D008297:Male; D009035:Mothers; D014504:Urban Health; D055815:Young Adult