ArticleNutrients2019
Why Secondary Analyses in Vitamin D Clinical Trials Are Important and How to Improve Vitamin D Clinical Trial Outcome Analyses-A Comment on "Extra-Skeletal Effects of Vitamin D,
Article in Nutrients, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 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
15 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Vitamin D Deficiency Meets Hill's Criteria for Causation in SARS-CoV-2 Susceptibility, Complications, and Mortality: A Systematic Review.Nutrients · 2025Pooled it
- Efficacy of Vitamin DNutrients · 2020Pooled it
- A comprehensive review on the impact of calcium and vitamin D insufficiency and allied metabolic disorders in females.Food science & nutrition · 2023Review
- Vitamin D Modulates the Response of Patient-Derived Metastatic Melanoma Cells to Anticancer Drugs.International journal of molecular sciences · 2023Article
- Vitamin D deficiency in British South Asians, a persistent but avoidable problem associated with many health risks (including rickets, T2DM, CVD, COVID-19 and pregnancy complications): the case for correcting this deficiency.Endocrine connections · 2022Review
- Vitamin D: Bolus Is Bogus-A Narrative Review.JBMR plus · 2021Article
- Does the High Prevalence of Vitamin D Deficiency in African Americans Contribute to Health Disparities?Nutrients · 2021Review
- Antioxidants for the Treatment of Breast Cancer: Are We There Yet?Antioxidants (Basel, Switzerland) · 2021Review
- Vitamin D Enhances Anticancer Properties of Cediranib, a VEGFR Inhibitor, by Modulation of VEGFR2 Expression in Melanoma Cells.Frontiers in oncology · 2021Article
- New Roles for Vitamin D Superagonists: From COVID to Cancer.Frontiers in endocrinology · 2021Review
- Vitamin D deficiency 2.0: an update on the current status worldwide.European journal of clinical nutrition · 2020Review
- Article
- Targeted 25-hydroxyvitamin D concentration measurements and vitamin DEuropean journal of clinical nutrition · 2020Review
- A Review of the Potential Benefits of Increasing Vitamin D Status in Mongolian Adults through Food Fortification and Vitamin D Supplementation.Nutrients · 2019Review
- Article
Corrections and comments
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Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Dear Editor, [...].
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.