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A new method for estimating the prevalence of iron deficiency anaemia is proposed. The method is based on determination of the percentage of subjects showing a significant response in haematocrit or haemoglobin value following supplementation with iron. The method was applied in a study of apparently healthy women in Uppsala. The response to placebo and iron supplementation was estimated in a total of 414 trials. The percentage of subjects showing a significant response to iron was calculated in each haematocrit interval; and the total percentage of subjects judged, on this basis, to be iron deficient in a randomly chosen sample from the community was estimated to be 17%.
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Garby et al. (1969) studied this question.
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