ArticleThe American journal of clinical nutrition2023
Hemoglobin distributions and prevalence of anemia in a multiethnic United States pregnant population.
Article in The American journal of clinical nutrition, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 12 citations in OpenAlex.
- Pregnancy Outcomes Associated With Anemia in the First Trimester and Anemia Resolution by Late Pregnancy.Obstetrics and gynecology · 2026Article
- Incidence and factors on anaemia during pregnancy in China: a multicentre prospective cohort study.Journal of global health · 2026Observational
- Maternal Prenatal Psychosocial Stress in Relation to Maternal and Neonatal Anemia.Current developments in nutrition · 2026Article
- Maternal hemoglobin drop in multiple pregnancy is associated with higher gestational age at birth and birthweight.Acta obstetricia et gynecologica Scandinavica · 2024Article
- The Centers for Disease Control and Prevention does not recommend race-adjusted thresholds to define anemia.The American journal of clinical nutrition · 2024Article
- Reply to M Jefferds et al.The American journal of clinical nutrition · 2024Article
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7 authors at 2 institutions in 1 country.
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Abstract
backgroundFew normative longitudinal hemoglobin data are available to estimate the prevalence and risk factors for anemia among a multiethnic United States pregnant population.
objectivesThe aim of this study was to characterize hemoglobin distributions and prevalence of anemia in a pregnant population receiving care at a large urban medical center.
methodsA retrospective medical chart review was undertaken in 41,226 uncomplicated pregnancies of 30,603 pregnant individuals who received prenatal care between 2011 and 2020. Mean hemoglobin concentrations and anemia prevalence in each trimester and incidence of anemia during pregnancy in a subset of 4821 women with data in each trimester were evaluated in relation to self-reported race and ethnicity and other possible risk factors. Risk ratios (RRs) of anemia were determined using generalized linear mixed-effects models. Smoothed curves describing changes in hemoglobin across pregnancy were created using generalized additive models.
resultsThe overall prevalence of anemia was 26.7%. The observed fifth percentiles of the hemoglobin distributions were significantly lower than the United States CDC anemia cutoffs in the second and third trimesters (T3). The RR (95% CI) of anemia were 3.23 (3.03, 3.45), 6.18 (5.09, 7.52), and 2.59 (2.48, 2.70) times higher in Black women than that in White women in each trimester, respectively. Asian women recorded the lowest risk of anemia compared with other racial groups in T3 (compared with White womenRR: 0.84; 95% CI: 0.74, 0.96). Hispanic women presented a higher risk of anemia in T3 than non-Hispanic women (RR: 1.36; 95% CI: 1.28, 1.45). In addition, adolescents, individuals with higher parity, and those carrying multiple fetuses experienced a higher risk of developing anemia in late gestation.
conclusionsAnemia was evident in more than one-quarter of a multiethnic United States pregnant population despite current universal prenatal iron supplementation recommendations. Prevalence of anemia was higher among Black women and lowest among Asian and White women.
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