ArticleClinical endocrinology2020
Low serum 25-hydroxyvitamin D (25[OH]D) levels in patients hospitalized with COVID-19 are associated with greater disease severity.
Article in Clinical endocrinology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 122 papers, 11 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
122 citing papers in PubMed, 11 syntheses or guidelines pooled it.
- The Effects of Vitamin D Supplementation in COVID-19 Patients: A Systematic Review.International journal of molecular sciences · 2022Pooled it
- Vitamins C and D and COVID-19 Susceptibility, Severity and Progression: An Evidence Based Systematic Review.Medicina (Kaunas, Lithuania) · 2022Pooled it
- Vitamin D Deficiency and Comorbidities as Risk Factors of COVID-19 Infection: A Systematic Review and Meta-analysis.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2022Pooled it
- The effect of vitamin D supplementation on mortality and intensive care unit admission of COVID-19 patients. A systematic review, meta-analysis and meta-regression.Diabetes/metabolism research and reviews · 2022Pooled it
- The role of vitamin D in the age of COVID-19: A systematic review and meta-analysis.International journal of clinical practice · 2021Pooled it
- Pooled it
- Association of Vitamin D Status with SARS-CoV-2 Infection or COVID-19 Severity: A Systematic Review and Meta-analysis.Advances in nutrition (Bethesda, Md.) · 2021Pooled it
- Micronutrients Deficiency, Supplementation and Novel Coronavirus Infections-A Systematic Review and Meta-Analysis.Nutrients · 2021Pooled it
- The role of vitamin D deficiency on COVID-19: a systematic review and meta-analysis of observational studies.Epidemiology and health · 2021Pooled it
- Vitamin D Status and SARS-CoV-2 Infection and COVID-19 Clinical Outcomes.Frontiers in public health · 2021Pooled it
- The Impact of Vitamin D Level on COVID-19 Infection: Systematic Review and Meta-Analysis.Frontiers in public healthPooled it
- Impact of vitamin D supplementation in the prognosis of patients with SARS-CoV2 pneumonia admitted to the intensive care unit - a randomized controlled trial.Frontiers in immunology · 2025Trial
- Trial
- Vitamin D and Lung Outcomes in Elderly COVID-19 Patients.Nutrients · 2021Trial
- "Effect of calcifediol treatment and best available therapy versus best available therapy on intensive care unit admission and mortality among patients hospitalized for COVID-19: A pilot randomized clinical study".The Journal of steroid biochemistry and molecular biology · 2020Trial
- Vitamin D Supplementation Improves Serological Parameters and Recovery Outcomes in COVID-19 Patients.Endocrine, metabolic & immune disorders drug targets · 2026Observational
- Vitamin D and COVID-19: Clinical Evidence and Immunological Insights.Life (Basel, Switzerland) · 2025Review
- Vitamin D as an Adjuvant Immune Enhancer to SARS-Cov-2 Vaccine.Current microbiology · 2025Article
- Vitamin D: A key player in COVID-19 immunity and lessons from the pandemic to combat immune-evasive variants.Inflammopharmacology · 2024Review
- Unveiling the Interplay-Vitamin D and ACE-2 Molecular Interactions in Mitigating Complications and Deaths from SARS-CoV-2.Biology · 2024Review
62 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
PubMed holds no abstract for this paper.
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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.