Systematic review of randomized trials of the effect of iron supplementation on iron stores and oxygen carrying capacity in pregnancy

EmAnemia na Grávida, Artigo cientifico, Artigo de RevisãoPorPaulo Baptista

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Acta Obstet Gynecol Scand. 2016 Mar;95(3):270-9. doi: 10.1111/aogs.12812. Epub 2015 Nov 17.

Systematic review of randomized trials of the effect of iron supplementation on iron stores and oxygen carrying capacity in pregnancy

Daru J^1,², Cooper NA^1,², Khan KS^1,².

Author information

^{1 – Women’s Health Research Unit, Barts and the London School of Medicine, Queen Mary University of London, London, UK.}
^{2 – Barts Health NHS Trust, London, UK.}

Abstract

INTRODUCTION: Anemia in pregnancy affects 25% of all pregnancies in Europe with iron deficiency affecting even more. Despite supplementation, iron deficiency persists. This review will assess the effect on serum ferritin (iron stores) and hemoglobin (oxygen-carrying capacity) following iron supplementation in pregnant women with anemic and non-anemic iron deficiency.

MATERIAL AND METHODS: A systemic search of electronic databases and trial registers was conducted from inception to January 2014. Randomized controlled trials of iron supplementation that measured serum ferritin and hemoglobin levels before and after supplementation were selected. Two independent reviewers selected studies, extracted data and assessed quality. Descriptive analyses were carried out.

RESULTS: The review included 23 randomized controlled trials (3525 women). In iron deficiency anemia, more studies described statistically significant increases in serum ferritin levels than in hemoglobin levels following intravenous iron supplementation. In non-anemic iron deficiency there were more statistically significant increases in serum ferritin levels than in hemoglobin levels following oral supplementation. There were no studies reporting maternal quality of life outcomes.

CONCLUSIONS: Serum ferritin appears to change more than hemoglobin following iron supplementation. The clinical effects of this need further investigation.

KEYWORDS: Iron deficiency anemia; hemoglobin; non-anemic iron deficiency; pregnancy; serum ferritin

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Systematic review of randomized trials of the effect of iron supplementation on iron stores and oxygen carrying capacity in pregnancy

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