Evidence map›Paper›PMID 37149566›Full record

ArticleBMC pregnancy and childbirth2023

Vitamin D deficiency in pregnancy and the risk of preterm birth: a nested case-control study.

Tashnia Tahsin, Rasheda Khanam, Nabidul Haque Chowdhury, A S M Tarik Hasan, Md Biplob Hosen, Sayedur Rahman, Anjan Kumar Roy, Salahuddin Ahmed, Rubhana Raqib, Abdullah H Baqui

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In one paragraph

Article in BMC pregnancy and childbirth, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
8.0field-weighted citation impact, top 2% 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

19 citing papers in PubMed, 27 citations in OpenAlex.

  1. Article
  2. Maternal vitamin D status and preterm birth: an eight-year retrospective cohort study in the Southeastern United States.Journal of perinatology : official journal of the California Perinatal Association · 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

10 authors at 5 institutions in 3 countries.

Tashnia Tahsin *Department of Medicine, West Virginia University, Morgantown, WV, USA.
Rasheda Khanam *Department of International Health, Johns Hopkins Bloomberg School for Public Health, Baltimore, MD, USA.
Nabidul Haque ChowdhuryProjahnmo Research Foundation, Banani, Dhaka-1213, Bangladesh.
A S M Tarik HasanProjahnmo Research Foundation, Banani, Dhaka-1213, Bangladesh.
Md Biplob HosenInternational Center for Diarrhoeal Disease Research, Dhaka, Bangladesh.
Sayedur RahmanDepartment of Women's and Children's Health, Uppsala University, Uppsala, Sweden.
Anjan Kumar RoyInternational Center for Diarrhoeal Disease Research, Dhaka, Bangladesh.
Salahuddin AhmedProjahnmo Research Foundation, Banani, Dhaka-1213, Bangladesh.
Rubhana RaqibInternational Center for Diarrhoeal Disease Research, Dhaka, Bangladesh.
Abdullah H BaquiDepartment of International Health, Johns Hopkins Bloomberg School for Public Health, Baltimore, MD, USA. abaqui@jhu.edu.
Biomedical Research Foundation · BDInternational Centre for Diarrhoeal Disease Research · BDBloomberg (United States) · USUppsala University · SEWest Virginia University · US

Funding

Bill and Melinda Gates Foundation OPP1054163
6 · The paper itself

Abstract

backgroundEach year, an estimated 15 million babies are born preterm. Micronutrient deficiencies, including vitamin D deficiency (VDD), are common in many low- and middle-income countries (LMICs), and these conditions are often associated with adverse pregnancy outcomes. Bangladesh experiences a high prevalence of VDD. The country also has a high preterm birth (PTB) rate. Using data from a population-based pregnancy cohort, we estimated the burden of VDD during pregnancy and its association with PTB.

methodsPregnant women (N = 3,000) were enrolled after ultrasound confirmation of gestational age at 8-19 weeks of gestation. Trained health workers prospectively collected phenotypic and epidemiological data at scheduled home visits. Trained phlebotomists collected maternal blood samples at enrollment and 24 -28 weeks of gestation. Aliquots of serum were stored at -80

resultsThe median and interquartile range of serum 25(OH)D was 38.0 nmol/L; 30.18 to 48.52 (nmol/L). After adjusting for co-variates, VDD was significantly associated with PTB [adjusted odds ratio (aOR) = 1.53, 95% confidence interval (CI) = 1.10 - 2.12]. The risk of PTB was also higher among women who were shorter (aOR = 1.81, 95% CI: 1.27-2.57), primiparous (aOR = 1.55, 95% CI = 1.12 - 2.12), passive smokers (aOR = 1.60, 95% CI = 1.09 - 2.34), and those who received iron supplementation during pregnancy (aOR = 1.66, 95% CI: 1.17, 2.37).

conclusionVDD is common in Bangladeshi pregnant women and is associated with an increased risk of PTB.

Indexed as

Premature BirthVitamin D DeficiencyCase-Control StudiesFemaleHumansInfantInfant, NewbornPregnancyPregnancy OutcomeVitamin DVitamin DBangladeshNested case–control studyPreterm birthSerum vitamin D

Identifiers

PMID37149566
PMCPMC10163702
OpenAlexW4372351801

What OpenQuestion holds

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LicenceCC BY
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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.