Evidence map›Paper›PMID 26404451›Full record

ArticleArchives of gynecology and obstetrics2016

Cord blood vitamin D status and neonatal outcomes in a birth cohort in Quebec, Canada.

Catherine Morgan, Linda Dodds, Donald B Langille, Hope A Weiler, B Anthony Armson, Jean-Claude Forest, Yves Giguère, Christy G Woolcott

Abstract read
In one paragraph

Article in Archives of gynecology and obstetrics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

11 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Vitamin D Status in Pregnant Women in Southern China and Risk of Preterm Birth: A Large-Scale Retrospective Cohort Study.Medical science monitor : international medical journal of experimental and clinical research · 2019
    Article
  8. Article
  9. Review
  10. Review
  11. Article
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

8 authors.

Catherine MorganDepartment of Community Health and Epidemiology, Centre for Clinical Research, Dalhousie University, 5790 University Avenue, Halifax, NS, B3H 1V7, Canada.
Linda DoddsDepartments of Obstetrics and Gynaecology and Pediatrics, Dalhousie University, 5980 University Avenue, PO Box 9700, Halifax, NS, B3K 6R8, Canada.
Donald B LangilleDepartment of Community Health and Epidemiology, Centre for Clinical Research, Dalhousie University, 5790 University Avenue, Halifax, NS, B3H 1V7, Canada.
Hope A WeilerSchool of Dietetics and Human Nutrition, McGill University, Macdonald Campus, MS2042a Macdonald Stewart Bldg, 21111 Lakeshore Rd, Ste. Anne de Bellevue, Quebec, H9X 3V9, Canada.
B Anthony ArmsonDepartment of Obstetrics and Gynaecology, Dalhousie University, 5980 University Avenue, PO Box 9700, Halifax, NS, B3K 6R8, Canada.
Jean-Claude ForestDepartment of Molecular Biology, Medical Biochemistry and Pathology, Centre Hospitalier Universitaire de Québec Research Centre, Université Laval, 10, rue de l'Espinay, Quebec, QC, G1L 3L5, Canada.
Yves GiguèreDepartment of Molecular Biology, Medical Biochemistry and Pathology, Centre Hospitalier Universitaire de Québec Research Centre, Université Laval, 10, rue de l'Espinay, Quebec, QC, G1L 3L5, Canada.
Christy G WoolcottDepartments of Obstetrics and Gynaecology and Pediatrics, Dalhousie University, 5980 University Avenue, PO Box 9700, Halifax, NS, B3K 6R8, Canada. christy.woolcott@dal.ca.ORCID http://orcid.org/0000-0002-4606-3125

Funding

CIHR 114955-1CIHR 244113
6 · The paper itself

Abstract

purposeSome evidence suggests that low maternal vitamin D status adversely affects perinatal health but few studies have examined cord blood vitamin D status. This project aimed to determine the association between the cord blood concentration of 25-hydroxyvitamin D [25(OH)D] and neonatal outcomes.

methodsA nested case-control study was conducted in Quebec City, Canada from 2005 to 2010. Included were 83 cases of low birthweight (LBW; <2500 g), 301 cases of small for gestational age (SGA; <10th percentile), 223 cases of preterm birth (PTB; <37 weeks' gestation), and 1027 controls. Levels of 25(OH)D were determined by chemiluminescence immunoassay. Adjusted odds ratios (OR) and 95 % confidence intervals (CI) were estimated with logistic regression.

resultsCord blood [25(OH)D] <50 nmol/L was associated with a lower risk of LBW compared to [25(OH)D] ≥75 nmol/L (OR 0.47 95 % CI 0.23-0.97). For 25(OH)D levels 50-75 nmol/L, a significant association was not demonstrated (OR 0.58, 95 % CI 0.34-1.01). No significant associations were observed between [25(OH)D] and either SGA or PTB after adjustment.

conclusionsAlthough our findings suggest that [25(OH)D] <50 nmol/L is associated with reduced risk of having a LBW infant, prenatal vitamin D recommendations require an examination of the literature that considers the full spectrum of maternal and neonatal outcomes.

Indexed as

BiomarkersCanadaCase-Control StudiesFemaleFetal BloodGestational AgeHumansInfantInfant, Low Birth WeightInfant, NewbornInfant, Small for Gestational AgeLogistic ModelsMaleOdds RatioPregnancyPremature Birth25-hydroxyvitamin DBiomarkersVitamin DVitamins25-Hydroxyvitamin DLow birth weightNested case–control studyPreterm birthSmall for gestational age

Identifiers

PMID26404451
PMCPMC5023425

What OpenQuestion holds

Textmetadata
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.