title: Calcium intake by adolescents: a population-based health survey.
abstract: OBJECTIVE
  To analyze calcium intake in adolescents according to sociodemographic variables, health-related behaviors, morbidities, and body mass index.
  
  
  METHODS
  This was a cross-sectional population-based study, with a two-stage cluster sampling that used data from a survey conducted in Campinas, São Paulo, Brazil, between 2008 and 2009. Food intake was assessed using a 24-hour dietary recall. The study included 913 adolescents aged 10-19 years.
  
  
  RESULTS
  Average nutrient intake was significantly lower in the segment with lower education of the head of the family and lower per capita family income, in individuals from other cities or states, those who consumed fruit less than four times a week, those who did not drink milk daily, those who were smokers, and those who reported the occurrence of headaches and dizziness. Higher mean calcium intake was found in individuals that slept less than seven hours a day. The prevalence of calcium intake below the recommendation was 88.6% (95% CI: 85.4-91.2).
  
  
  CONCLUSIONS
  The results alert to an insufficient calcium intake and suggest that certain subgroups of adolescents need specific strategies to increase the intake of this nutrient.
authors.affiliation: Department of Collective Health, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors.forename: Daniela
authors.initials: D
authors.lastname: de Assumpção
authors.affiliation: Department of Pediatrics, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors.forename: Marcia Regina Messaggi Gomes
authors.initials: MR
authors.lastname: Dias
authors.affiliation: Department of Collective Health, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil.
authors.forename: Marilisa Berti
authors.initials: MB
authors.lastname: de Azevedo Barros
authors.affiliation: Department of Nutrition, Faculdade de Saúde Pública, Universidade de São Paulo (USP), São Paulo, SP, Brazil.
authors.forename: Regina Mara
authors.initials: RM
authors.lastname: Fisberg
authors.affiliation: Department of Pediatrics, Faculdade de Ciências Médicas, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil. Electronic address: abarros@fcm.unicamp.br.
authors.forename: Antonio
authors.initials: A
authors.lastname: de Azevedo Barros Filho
mesh_terms: D000293:Adolescent; D000067697:Adolescent Health; D000328:Adult; D001938:Brazil; D002136:Calcium, Dietary / Q000008:administration & dosage*; D002648:Child; D003430:Cross-Sectional Studies; D004435:Eating; D002149:Energy Intake; D005247:Feeding Behavior; D005260:Female; D005638:Fruit; D006801:Humans; D008297:Male; D009749:Nutrition Surveys; D009752:Nutritional Status; D012959:Socioeconomic Factors; D014505:Urban Population; D055815:Young Adult
chemical_list: D002136:Calcium, Dietary
keywords: Adolescent; Adolescente; Calcium dietary; Consumo de alimentos; Cálcio na dieta; Food consumption; Health surveys; Inquérito de saúde