SynthesisBMC public health2021
High prevalence of vitamin D deficiency among the South Asian adults: a systematic review and meta-analysis.
Synthesis in BMC public health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 96 papers, 7 of them syntheses that pooled it.
What it found
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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
96 citing papers in PubMed, 7 syntheses or guidelines pooled it, 179 citations in OpenAlex.
- Global Genetic Variation in Circulating 25-Hydroxyvitamin D: A Systematic Review of GWAS Evidence Across Different Ancestral Groups.Nutrients · 2026Pooled it
- Effects of Maternal Vitamin D Supplementation on Childhood Health.Endocrine reviews · 2026Pooled it
- Effects of Maternal Vitamin D Supplementation on Childhood Health.Endocrine reviews · 2025Pooled it
- The role of vitamin D in the prevention and treatment of tuberculosis: a meta-analysis of randomized controlled trials.Infection · 2025Pooled it
- Vitamin D status among apparently healthy individuals in the UAE: a systematic review.Frontiers in nutrition · 2025Pooled it
- Effects of intermittent or single high-dose vitamin D supplementation on risk of falls and fractures: a systematic review and meta-analysis.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2023Pooled it
- Knowledge, Attitude and Practices Toward Coronavirus Disease (COVID- 19) in Southeast and South Asia: A Mixed Study Design Approach.Frontiers in public health · 2022Pooled it
- Impact of consumption of vitamin D fortified foods on serum vitamin D concentrations and vitamin D status in families living in Pune, India: an effectiveness study.European journal of nutrition · 2025Trial
- Clinical and serological association of plasma 25-hydroxyvitamin D (25(OH)D) levels in lupus and the short-term effects of oral vitamin D supplementation.Arthritis research & therapy · 2023Trial
- Letter to the Editor: Vitamin D deficiency and post-transplant diabetes in kidney recipients - opportunity for risk stratification and intervention.World journal of nephrology · 2026Article
- Article
- A three-stage family medicine approach to unmasking vitamin D deficiency in a post-COVID-19 prediabetes patient.Journal of family medicine and primary care · 2026Article
- Vitamin D status and its association with diabetic complications in type 2 diabetes mellitus: A case-control study.Nutrition and health · 2026Article
- Effects of vitamin D supplementation combined with resistance exercise on body composition and metabolic variables in older women: a randomized clinical trial.Clinics (Sao Paulo, Brazil) · 2026Article
- Prescribing practices of healthcare professionals regarding multivitamins and mineral supplements in Pakistan: a cross-sectional study.BMJ open · 2026Article
- Prevalence of Hypovitaminosis D in Adults Presenting With Generalized Aches: A Hospital-Based Observational Study.Cureus · 2026Article
- Advances in Nanoparticle-Based Vitamin Delivery Systems for Precision Nutrition and Improved Bioavailability.AAPS PharmSciTech · 2026Review
- Burden of Vitamin D Deficiency in Female Patients in Different Stages of Life: a Retrospective Study.Maedica · 2026Article
- Culturally Informed Dietary Approaches for Cardiometabolic Risk Reduction in South Asians: An Evidence-Based Review.Journal of clinical medicine · 2026Review
- Association of Vitamin D Status with Radiographic Changes in Knee Osteoarthritis Patients.Cureus · 2026Article
36 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundVitamin-D deficiency is linked to a wide range of chronic and infectious diseases. Body of literature suggested that the prevalence of this deficiency can have geographical variation. Although vitamin D deficiency is frequently reported in the South Asian population, the scarcity of systematic reviews and meta-analysis means the true extent of the disease and the underlying factors causing it are poorly characterized.
methodsA systematic search was performed using two databases (PubMed and Scopus) and one search engine (Google Scholar) for original studies on the South Asian population (published from January 1, 2001, to December 31, 2019). Following the search, a random effect meta-analysis was performed to calculate population-level weighted average, the pooled prevalence of deficiency, and heterogeneity of vitamin D among different countries and genders; in addition to South Asia as a whole.
resultsOur study, based on our selection criteria was narrowed down to a total of 44,717 participants; which spanned over 65 studies from five South Asian countries. Overall, the pooled prevalence of deficiency was 68% [95% CI: 64 to 72%] with significant heterogeneity (I
conclusionOur findings reveal highly prevalent and variable vitamin D deficiency among the adults of different South Asian countries. Findings from this review would be helpful to generate hypotheses and explore the factors affecting the inter-country variability, alongside strengthening evidence for governments to prioritize mitigation strategies in this region.
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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.