ArticlePloS one2015
Maternal Vitamin D Status and Its Related Factors in Pregnant Women in Bangkok, Thailand.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers, 2 of them syntheses that pooled 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.
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.
Who cites it
25 citing papers in PubMed, 2 syntheses or guidelines pooled it, 56 citations in OpenAlex.
- Vitamin D levels and its influencing factors in pregnant women in mainland China: A systematic review and meta-analysis.PloS one · 2024Pooled it
- Pooled estimate of vitamin D deficiency among pregnant women in India: a systematic review and meta-analysis.Journal of health, population, and nutrition · 2021Pooled it
- Improving Vitamin D Status in Preterm Newborns: A Randomized Trial of 800 vs. 400 IU/Day.Nutrients · 2025Trial
- Vitamin D status in full-term exclusively breastfed infants versus full-term breastfed infants receiving vitamin D supplementation in Thailand: a randomized controlled trial.BMC pediatrics · 2021Trial
- Vitamin D status and response to supplementation in very preterm infants: A prospective cohort study.European journal of clinical nutrition · 2026Observational
- Impact of Clinoptilolite and Anionic Salts on Calcium Homeostasis, Parathyroid Hormone, and Related Metabolic Parameters in Periparturient Dairy Cows.Veterinary sciences · 2026Article
- Maternal Vitamin D Deficiency and Its Effects on Pregnancy Outcomes.Food science & nutrition · 2026Article
- Relationship Between Total 25-Hydroxyvitamin D and Parathyroid Hormone Concentrations During Early Gestation in Indian Women.Nutrients · 2025Article
- Vitamin D status in non-pregnant women of reproductive age: a study in Southern Thailand.Scientific reports · 2023Article
- Maternal vitamin D status in early pregnancy and its association with gestational diabetes mellitus in Shanghai: a retrospective cohort study.BMC pregnancy and childbirth · 2022Article
- Review
- Predictors of 25-hydroxyvitamin D concentrations during pregnancy: A longitudinal analysis in the Brazilian Amazon.European journal of clinical nutrition · 2022Article
- Maternal Vitamin D Status and Its Associated Environmental Factors: A Cross-Sectional Study.Ethiopian journal of health sciences · 2022Article
- Influence of vitamin D binding protein polymorphism, demographics and lifestyle factors on vitamin D status of healthy Malaysian pregnant women.BMC pregnancy and childbirth · 2020Article
- Prevalence and risk factors of hypovitaminosis D in pregnant Spanish women.Scientific reports · 2020Article
- Regimens of vitamin D supplementation for women during pregnancy.The Cochrane database of systematic reviews · 2019Review
- Vitamin D deficiency during pregnancy and its associated factors among third trimester Malaysian pregnant women.PloS one · 2019Article
- The relationship between maternal vitamin D status during third trimester of pregnancy and maternal and neonatal outcomes: A longitudinal study.International journal of reproductive biomedicine · 2019Article
- High frequency of vitamin D deficiency in current pregnant Japanese women associated with UV avoidance and hypo-vitamin D diet.PloS one · 2019Article
- Prevalence of vitamin D deficiency in cord blood of newborns and the association with maternal vitamin D status.European journal of pediatrics · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThere are few data focusing on the prevalence of vitamin D deficiency in tropical countries.
objectivesWe determined the vitamin D status in pregnant women and examined the factors associated with vitamin D deficiency. DESIGN AND
methodsA cross-sectional study of 147 pregnant Thai women aged 18-45 years at Siriraj Hospital (a university hospital in Bangkok, Thailand) was undertaken. Clinical data and plasma levels of 25-hydroxyvitamin D [25(OH)D], intact parathyroid hormone (iPTH), calcium, albumin, phosphate and magnesium were obtained in pregnant women at delivery.
resultsThe prevalence of hypovitaminosis D [defined as 25(OH)D <75 nmol/L] in pregnant women at delivery was 75.5% (95% confidence interval (CI), 67.7-82.2%). Of these, vitamin D insufficiency [defined as 25(OH)D 50-74.9 nmol/L] was found in 41.5% (95% CI, 33.4-49.9%) and vitamin D deficiency [25(OH)D <50 nmol/L] was found in 34.0% (95% CI, 26.4-42.3%) of women. The mean 25(OH)D concentration was 61.6 ± 19.3 nmol/L. The correlation between 25(OH)D and iPTH was weak (r = -0.29, P<0.01). Factors associated with vitamin D deficiency by multiple logistic regression were: pre-pregnancy body mass index (BMI in kg/m2, odds ratio (OR), 0.88, 95% CI 0.80-0.97, P = 0.01) and season of blood collection (winter vs. rainy, OR, 2.62, 95% CI 1.18-5.85, P = 0.02).
conclusionsVitamin D deficiency is common among pregnant Thai women. The prevalence of vitamin D deficiency increased in women who had a lower pre-pregnancy BMI and whose blood was collected in the winter. Vitamin D supplementation may need to be implemented as routine antenatal care.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.