Validity and reproducibility of a computerised tool for assessing the iron, calcium and vitamin C intake of Belgian women

Objective: To determine the relative validity of a newly developed iron intake assessment tool, designed specifically to assess iron, calcium and vitamin C intake. Design: Estimates of iron, calcium and vitamin C intake from a computerised iron intake assessment tool compared with those from 11-day...

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Bibliographic Details
Published in:European journal of clinical nutrition 2004-09, Vol.58 (9), p.1297-1305
Main Authors: Matthys, C, Pynaert, I, Roe, M, Fairweather-Tait, S.J, Heath, A.L.M, De Henauw, S
Format: Article
Language:English
Subjects:
Adolescent
Adult
Ascorbic acid
Ascorbic Acid - administration & dosage
Belgium
Biological and medical sciences
Calcium
Calcium, Dietary - administration & dosage
Computers
Correlation coefficient
Correlation coefficients
Diet
Diet Records
Diet Surveys
Dietary intake
Epidemiology
Female
Food intake
Humans
Investigative techniques, diagnostic techniques (general aspects)
Iron
Iron, Dietary - administration & dosage
Medical sciences
Miscellaneous. Technology
Nutrients
Nutrition Assessment
Pathology. Cytology. Biochemistry. Spectrometry. Miscellaneous investigative techniques
Reproducibility
Reproducibility of Results
Sensitivity and Specificity
Surveys and Questionnaires - standards
Vitamin C
Women
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Summary:Objective: To determine the relative validity of a newly developed iron intake assessment tool, designed specifically to assess iron, calcium and vitamin C intake. Design: Estimates of iron, calcium and vitamin C intake from a computerised iron intake assessment tool compared with those from 11-day estimated dietary records. Setting: Region of Ghent (N = +/- 225 000), a city in Flanders, the Dutch-speaking part of Belgium. Subjects: In all, 50 women aged 18-39y, participating in a large-scale epidemiological study on iron intake and iron status. Main results: Mean dietary iron intake from the 11-day food record, the unadjusted dietary iron intake assessment tool and the adjusted tool was, respectively, 10.5 +/- 2.7, 10.4 +/- 4.3 and 9.6 +/- 2.9 mg. For the different nutrients, the correlation coefficients vary from 0.45 to 0.60 for adjusted intake. The mean difference of iron intake by the two methods (0.8 +/- 2.9 mg) did not differ significantly from zero. The new method correctly classified 38% (iron), 38% (calcium) and 58% (vitamin C) of the subjects to the correct tertile. The correlation coefficients ranged from 0.48 for adjusted vitamin C intake to 0.73 for adjusted calcium intake between two administrations. Conclusion: The newly developed instrument can be used to assess mean group intakes of iron, calcium and vitamin C in women consuming a Western diet. However, since the ranking capability of the new tool is rather weak, further refinement of the tool is required to produce a robust method for assessing iron, calcium and vitamin C intakes of individuals.
ISSN:0954-3007
1476-5640
DOI:10.1038/sj.ejcn.1601965