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Department of Nutrition, University of North Carolina Schools of Public Health and Medicine, Chapel Hill, NC and the * Maternal and Child Nutrition Branch, Division of Nutrition and Physical Activity, Centers for Disease Control and Prevention, Atlanta, GA
1To whom correspondence should be addressed. E-mail: mec0{at}cdc.gov.
We estimated the prevalence of postpartum iron deficiency, anemia and iron deficiency anemia in the United States and compared risk of iron deficiency between women 0–24 mo postpartum (n = 680) and never-pregnant women, 20–40 y old (n = 587). We used data from National Health and Nutrition Examination Survey, 1988–1994. Iron deficiency was defined as abnormal values for 
2 of 3 iron status measures (serum ferritin, free erythrocyte protoporphyrin, transferrin saturation). Iron deficiency prevalences for women 0–6, 7–12 and 13–24 mo postpartum were 12.7, 12.4 and 7.8%, respectively, and 6.5% among never-pregnant women. After adjustment for confounding, the risk of iron deficiency among women with a poverty index ratio 
130% who were 0–6, 7–12 and 13–24 mo postpartum was 4.1 (95% confidence interval 2.0, 7.2), 3.1 (1.3, 6.5) and 2.0 (0.8, 4.1) times as great, respectively, as never-pregnant women with a poverty index ratio > 130%, but risk was not elevated for never-pregnant women with a poverty index ratio 130%. Compared with the same referent, the risk of iron deficiency was not meaningfully different for women with a poverty index ratio > 130% who were 0–6, 7–12 or 13–24 mo postpartum. Given that low income postpartum women bear a substantially greater iron deficiency risk than never-pregnant women, more attention should be given to preventing iron deficiency among low income women during and after pregnancy.
KEY WORDS: • iron deficiency • postpartum • women • low income • iron
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