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Document Type

Open Access

Degree Program

Nutrition

Degree Type

Master of Science (M.S.)

Year Degree Awarded

2011

Month Degree Awarded

February

Keywords

iron depletion, anemia, iron deficiency anemia, arsenic, c-reactive protein

Abstract

Iron depletion (ID) is the most common nutrient deficiency worldwide and is the leading cause of anemia. Chronic arsenic (As) exposure is a major public health problem in Bangladesh and triggers inflammatory responses that render iron status assessment challenging. We assessed the prevalence of ID and iron deficiency anemia (IDA) in 147 arsenic-exposed Bangladeshi women (75 skin lesion cases; 72 controls), ages 18-33 years, who were part of a skin lesion study. Hemoglobin (Hb) was measured in whole blood; ferritin and hs-c-reactive protein (CRP) were measured in serum. The prevalence of anemia (Hb<120g/L) was 18%. Although the prevalence of ID (ferritin≤12mcg/L) did not differ between cases and controls, anemia was more common among cases (25% vs. 10%; p=0.02). Of anemic women, 27% (N=7) also had ID (Hb<120g/L and ferritin≤12mcg/L), indicating IDA. Women with normal iron status had higher toenail arsenic compared to iron-depleted women (2.9 vs 1.4 µg As/g toenail; p=0.00), and their water arsenic concentration was higher than that of iron-depleted women (18.8 vs 6.2 µg As/L; p=0.03); every 1µg increase in toenail As was associated with a 45% lowered risk of ID (OR=0.55, 95%CI=0.33,0.94). Much of the anemia in this cohort appears unrelated to ID, but could be linked to other nutrients, such as folate and vitamin B12, which are involved in both hematopoiesis and arsenic metabolism. It is possible that arsenic exposure in this cohort compromised folate and vitamin B12 status.

First Advisor

Alayne G Ronnenberg

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