Evidence map›Paper›PMID 32743650›Full record

ArticleThe American journal of clinical nutrition2019

Adjusting iron and vitamin A status in settings of inflammation: a sensitivity analysis of the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) approach.

Sorrel M L Namaste, Jiangda Ou, Anne M Williams, Melissa F Young, Emma X Yu, Parminder S Suchdev

Open access · hybridAbstract readValidation Study
In one paragraph

Article in The American journal of clinical nutrition, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
3.0field-weighted citation impact, top 7% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 40 citations in OpenAlex.

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  4. Cortisol Stress Response is Associated with Iron Status in Pregnancy.medRxiv : the preprint server for health sciences · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 1 country.

Sorrel M L NamasteThe DHS Program, ICF, Rockville, MD, USA.
Jiangda OuHubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Anne M WilliamsHubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Melissa F YoungHubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Emma X YuHubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Parminder S SuchdevHubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, GA, USA.
Emory University · USCDC Foundation · USICF International (United States) · USMcKing Consulting (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAccurate assessment of iron and vitamin A status is needed to inform public health decisions, but most population-level iron and vitamin A biomarkers are independently influenced by inflammation.

objectivesWe aimed to assess the reproducibility of the Biomarkers Reflecting Inflammation and Nutritional Determinants of Anemia (BRINDA) regression approach to adjust iron [ferritin, soluble transferrin receptor (sTfR)] and vitamin A [retinol-binding protein (RBP), retinol] biomarkers for inflammation (α-1-acid glycoprotein and C-reactive protein).

methodsWe conducted a sensitivity analysis comparing unadjusted and adjusted estimates of iron and vitamin A deficiency using the internal-survey regression approach from BRINDA phase 1 (16 surveys in children, 10 surveys in women) and 13 additional surveys for children and women (BRINDA phase 2).

resultsThe relations between inflammation and iron or vitamin A biomarkers were statistically significant except for vitamin A biomarkers in women. Heterogeneity of the regression coefficients across surveys was high. Among children, internal-survey adjustments increased the estimated prevalence of depleted iron stores (ferritin <12 µg/L) by a median of 11 percentage points (pp) (24 pp and 9 pp in BRINDA phase 1 and phase 2, respectively), whereas estimates of iron-deficient erythropoiesis (sTfR >8.3 mg/L) decreased by a median of 15 pp (15 pp and 20 pp in BRINDA phase 1 and phase 2, respectively). Vitamin A deficiency (RBP <0.7 µmol/L or retinol <0.7 µmol/L) decreased by a median of 14 pp (18 pp and 8 pp in BRINDA phase 1 and phase 2, respectively) in children. Adjustment for inflammation in women resulted in smaller differences in estimated iron deficiency than in children.

conclusionsOur findings are consistent with previous BRINDA conclusions that not accounting for inflammation may result in an underestimation of iron deficiency and overestimation of vitamin A deficiency. Research is needed to understand the etiology of the heterogeneity in the regression coefficients before a meta-analyzed regression correction can be considered.

Indexed as

Nutritional StatusNutrition AssessmentAdolescentAdultAnemiaAnemia, Iron-DeficiencyBiomarkersChild, PreschoolC-Reactive ProteinFemaleFerritinsHumansInfantInflammationIronMaleBiomarkersC-Reactive ProteinFerritinsIronOrosomucoidReceptors, TransferrinRetinol-Binding ProteinsVitamin Abiomarkersinflammationironmeta-analysismicronutrientnutritional assessmentvitamin A

Identifiers

PMID32743650
PMCPMC7396268
OpenAlexW3047539165

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.