Evidence map›Paper›PMID 28700535›Full record

ArticleInflammatory bowel diseases2017

Vitamin D Status Is Associated with Hepcidin and Hemoglobin Concentrations in Children with Inflammatory Bowel Disease.

Sana Syed, Ellen S Michalski, Vin Tangpricha, Supavit Chesdachai, Archana Kumar, Jarod Prince, Thomas R Ziegler, Parminder S Suchdev, Subra Kugathasan

Open access · bronzeAbstract read
In one paragraph

Article in Inflammatory bowel diseases, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 10% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 40 citations in OpenAlex.

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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

9 authors at 3 institutions in 1 country.

Sana Syed*Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia; †Division of Gastroenterology, Hepatology and Nutrition, Children's Healthcare of Atlanta, Atlanta, Georgia; ‡Nutrition and Health Sciences Program, Laney Graduate School, Emory University, Atlanta, Georgia; §Department of Medicine, Emory University School of Medicine; and ‖Atlanta VA Medical Center, Atlanta, Georgia.
Ellen S Michalski
Vin Tangpricha
Supavit Chesdachai
Archana Kumar
Jarod Prince
Thomas R Ziegler
Parminder S Suchdev
Subra Kugathasan
Emory University · USChildren's Healthcare of Atlanta · USAtlanta Medical Center · US

Funding

Atlanta Clinical and Translational Science Institute (ACTSI) RenewalUL1TR000454 · NCATS · EMORY UNIVERSITY · PI STEPHENS, DAVID S · 2012 to 2016
$25.8M
Gene discoveries in subjects with Crohn's disease of African descentR01DK087694 · NIDDK · EMORY UNIVERSITY · PI KUGATHASAN, SUBRA · 2011 to 2023
$10.3M
Nutrition Sciences and HealthT32DK007734 · NIDDK · EMORY UNIVERSITY · PI RAMAKRISHNAN, USHA · 1997 to 2016
$2.5M
Patient Oriented Research in Clinical NutritionK24RR023356 · NCRR · EMORY UNIVERSITY · PI ZIEGLER, THOMAS R · 2007 to 2011
$839k
NCATS NIH HHS UL1 TR000454NCRR NIH HHS K24 RR023356NIDDK NIH HHS R01 DK087694NIDDK NIH HHS T32 DK007734
6 · The paper itself

Abstract

backgroundAnemia, iron deficiency, and hypovitaminosis D are well-known comorbidities in inflammatory bowel disease (IBD). Epidemiologic studies have linked vitamin D deficiency with increased risk of anemia, and in vitro studies suggest that vitamin D may improve iron recycling through downregulatory effects on hepcidin and proinflammatory cytokines.

methodsWe aimed to investigate the association of vitamin D status with inflammation, iron biomarkers, and anemia in pediatric IBD. Cross-sectional data were obtained from N = 69 patients with IBD aged 5 to <19 years. Iron biomarkers (ferritin, soluble transferrin receptor), and 25-hydroxyvitamin D (25(OH)D), inflammatory biomarkers (C-reactive protein and α-1-acid glycoprotein), hepcidin, and hemoglobin were collected. Iron biomarkers were regression corrected for inflammation. Multivariable logistic/linear models were used to examine the associations of 25(OH)D with inflammation, iron status, hepcidin, and anemia.

resultsApproximately 50% of subjects were inflamed (C-reactive protein >5 mg/L or α-1-acid glycoprotein >1 g/L). Iron deficiency prevalence (inflammation-corrected ferritin <15 μg/L or soluble transferrin receptor >8.3 mg/L) was 67%; anemia was 36%, and vitamin D insufficiency (25(OH)D <30 ng/mL) was 77%. In linear regression models, vitamin D insufficiency was associated with increased hepcidin levels (β [SE] = 0.6 [0.2], P = 0.01) and reduced hemoglobin (β [SE] = -0.9 [0.5], P = 0.046), controlling for age, sex, race, insurance status, body mass index for age, inflammation, disease diagnosis (ulcerative colitis versus Crohn's disease), and disease duration, compared with 25(OH)D ≥30 ng/mL.

conclusionsOur results suggest that concentrations of 25(OH)D ≥30 ng/mL are associated with lower hepcidin and higher hemoglobin levels. Further research is needed to clarify the association of vitamin D with inflammation, iron status, and anemia in pediatric IBD.

Indexed as

AdolescentAnemia, Iron-DeficiencyBiomarkersChildChild, PreschoolColitis, UlcerativeC-Reactive ProteinCrohn DiseaseCross-Sectional StudiesFemaleHemoglobinsHepcidinsHumansIronLinear ModelsMale25-hydroxyvitamin DBiomarkersC-Reactive ProteinHemoglobinsHepcidinsIronOrosomucoidVitamin D

Identifiers

PMID28700535
PMCPMC5716347
OpenAlexW2735739225

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

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.