ReviewDermatology and therapy2020
Association of Alopecia Areata with Vitamin D and Calcium Levels: A Systematic Review and Meta-analysis.
Review in Dermatology and therapy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis 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
7 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.
- Vitamin D deficiency in non-scarring and scarring alopecias: a systematic review and meta-analysis.Frontiers in nutrition · 2024Pooled it
- Vitamin D and its Analogs in Treatment of Mild to Moderate Alopecia Areata: Systematic Review and Meta-Analysis.Indian dermatology online journal · 2026Article
- Assessment of Intestinal Free Fatty Acid Binding Protein 4 in Alopecia Areata Patients.Skin appendage disorders · 2025Article
- Unveiling the immune and vitamin profiles of blood: the potential biomarkers for alopecia areata.PeerJ · 2025Article
- Skin Disorders and Osteoporosis: Unraveling the Interplay Between Vitamin D, Microbiota, and Epigenetics Within the Skin-Bone Axis.International journal of molecular sciences · 2024Review
- The role of salivary vitamin D and interleukin-6 on non-scarring Alopecia.Archives of dermatological research · 2024Article
- Vitamin D supplementation for patients with alopecia areata: A protocol for systematic review and meta-analysis.Medicine · 2022Article
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 at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionTo investigate the associations of alopecia areata (AA) with serum vitamin D and calcium levels.
methodsA systematic review of all relevant articles published up to February 2020 in PubMed, Embase, and Cochrane Library databases was conducted. Primary endpoints were serum 25-hydroxyvitamin D [25(OH)D] levels and vitamin D deficiency, and the secondary endpoint was serum calcium level. Odds ratio (OR) and standardized mean difference (SMD) with 95% CI across studies were analyzed.
resultsData on 1585 patients with AA and 1114 controls from 16 case-control studies and three cross-sectional studies were included in this meta-analysis. A pooled meta-analysis was conducted using the random-effects model because of inter-study heterogeneity (vitamin D level, I
conclusionDeficiency of serum 25(OH)D level, rather than calcium level, was present in patients with AA. Screening for vitamin D deficiency and vitamin D supplementation may be beneficial in the treatment of patients with AA.
Indexed as
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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 OpenQuestion graph.