title: Evaluation of a 2-day food record to determine iron, calcium and vitamin C intake in young Belgian women.
abstract: OBJECTIVE
  Evaluation of a 2-day food record (FR) for the assessment of iron, calcium and vitamin C intake.
  
  
  METHODS
  In a subsample of a large-scale epidemiological study, iron, calcium and vitamin C intake were estimated using a 2-day FR and compared to the nutrient intakes assessed by an 11-day FR (reference method).
  
  
  METHODS
  City of Ghent, Dutch speaking part of Belgium.
  
  
  METHODS
  A number of 51 non-pregnant women (18-39 years).
  
  
  RESULTS
  Mean iron, calcium and vitamin C intakes were not significantly different between the reference method and 2-day FR. Correlation coefficients of 0.63 (iron) and 0.76 (calcium, vitamin C) were reached. The iron intake of 95% of the individuals assessed by the 2-day FR varied between 5 mg above or below the reference intake. Over 50% of the women were correctly classified and 4% or fewer were extremely misclassified by the 2-day FR. Mean 11-day FR intakes increased progressively over the tertiles defined by the 2-day FR. The 11-day energy intake was under-reported by 28% of the women; no over-reporters were identified.
  
  
  CONCLUSIONS
  The 2-day FR is able to estimate mean iron, calcium and vitamin C intake and to rank individuals along the distribution of intakes.
authors.affiliation: Department of Public Health, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium. Ilse.Pynaert@UGent.be
authors.forename: I
authors.initials: I
authors.lastname: Pynaert
authors.forename: C
authors.initials: C
authors.lastname: Matthys
authors.forename: D De
authors.initials: DD
authors.lastname: Bacquer
authors.forename: G De
authors.initials: GD
authors.lastname: Backer
authors.forename: S De
authors.initials: SD
authors.lastname: Henauw
mesh_terms: D000293:Adolescent; D000328:Adult; D001205:Ascorbic Acid / Q000008:administration & dosage*; D001530:Belgium; D002136:Calcium, Dietary / Q000008:administration & dosage*; D015930:Diet Records; D004034:Diet Surveys; D005260:Female; D006801:Humans; D019266:Iron, Dietary / Q000008:administration & dosage*; D015596:Nutrition Assessment; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D011795:Surveys and Questionnaires; D013997:Time Factors
chemical_list: D002136:Calcium, Dietary; D019266:Iron, Dietary; D001205:Ascorbic Acid