The prevalence vitamin A deficiency has traditionnaly been assessed through xerophthalmia or biochemical surveys.
The cost and complexity of implementing these methods limits the ability of nonresearch organizations to identify vitamin A deficiency.
This study examined the validity of a simple, inexpensive food frequency method to identify areas with a high prevalence of vitamin A deficiency.
Methods ; The validity of the method was tested in 15 communities, 5 each from the Philippines, Guatemala, and Tanzania.
Serum retinol concentrations of less than 20 mug/dL defined vitamin A deficiency.
Weighted measures of vitamin A intake six or fewer times per week and unweighted measures of consumption of animal sources of vitamin A four or fewer times per week correctly classified seven of eight communities as having a high prevalence of vitamin A deficiency (i.e., 15% or more of preschool-aged children in community had the deficiency) (sensitivity=87.5%) and four of seven communities as having a low prevalence (specificity=57.1%). Conclusions.
This method correctly classified the vitamin A deficiency status of 73.3% of the communities but demonstrated a high falsepositive rate (42.9%).
Mots-clés Pascal : Questionnaire, Méthode étude, Validation test, Fidélité test, Carence vitaminique, Rétinol, Enfant, Homme, Consommation alimentaire, Comportement alimentaire, Vitamine, Trouble nutrition, Fréquence alimentaire
Mots-clés Pascal anglais : Questionnaire, Investigation method, Test validation, Test reliability, Vitamin deficiency, Retinol, Child, Human, Food intake, Feeding behavior, Vitamin, Nutrition disorder
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0363034
Code Inist : 002B30A01A1. Création : 12/09/1997.