SynthesisBMC pediatrics2025
Association between prenatal vitamin D supplementation and respiratory diseases in children: a systematic review and meta-analysis.
Synthesis in BMC pediatrics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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
2 citing papers in PubMed.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundImmunomodulation and respiratory health have a critical role in the offspring well-being. Maternal status of vitamin D during pregnancy seems to have immunomodulatory and respiratory protective effects in children. However, evidence regarding respiratory and allergy-related outcomes remains conflicting. Therefore, this study aimed to synthesize the available data in this regard to provide a firm direction.
methodsComprehensive searches were made in the databases of PubMed, Scopus, the Web of Science, and the Cochrane Library until August 2025. We included randomized controlled trials (RCTs) to evaluate the effects of maternal intake of vitamin D during pregnancy on outcomes in children with respiratory and allergy conditions. Also, the quality of evidence was evaluated using GRADE method and the Cochrane risk-of-bias tool was used to evaluate study quality.
resultsSeven RCTs were included. Prenatal supplementation of vitamin D did not affect respiratory outcomes in the children who followed: RTI (RR: 1.04; 95% CI: 0.99, 1.09; P = 0.122, I
conclusionOverall, the vitamin D supplementation during pregnancy has no significant effect on respiratory and allergy-related outcomes in children.
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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 Socratic graph.