Vitamin D supplementation for patients with alopecia areata: A protocol for systematic review and meta-analysis.
Study Design
- Type d'étude
- Meta-analysis
- Intervention
- Vitamin D supplementation for patients with alopecia areata: A protocol for systematic review and meta-analysis. None
- Comparateur
- Placebo
- Direction de l'effet
- Neutral
- Risque de biais
- Unclear
Abstract
BACKGROUND: Several studies have reported an association between low Vitamin D (VD) levels and Alopecia areata (AA), and suggested VD preparations as a potential therapy. VD has immunomodulatory function closely associated with a variety of skin diseases, but there is no conclusive evidence to support VD supplementation for patients with AA. Therefore, we will conduct a meta-analysis to collect and evaluate the efficacy and safety of VD supplementation in the treatment of AA. METHODS: We will search the following databases according to the developed strategy: Cochrane Library, PubMed, Web of Science, EMBASE, Scopus, Google scholar for Randomized controlled trials related to VD supplementation for AA. The retrieval time is from the establishment of each database to July 2022. Two reviewers will independently complete the literature search and screening, risk of bias assessment and data extraction. Severity of Alopecia Tool, Alopecia Density and Extent, Lesional area and senstivity (score) will be the primary results. RevMan V.5.3 will be used for data analysis and synthesis. For dichotomous outcomes and the continuous outcomes, we will calculate risk ratio with 95% Confidence intervals and mean differences or standardized mean differences with 95% Confidence intervals respectively. The reporting bias will be investigated using funnel plots, and the asymmetry of the funnel plots will be explained using the Harbord modified test or the Egger's regression test. RESULTS: The results of the study expect to provide a high-quality, evidence-based recommendation on VD supplementation in the treatment of AA for clinicians. CONCLUSIONS: The study will provide scientific and useful evidence for better use of VD supplementation in treating AA.
Full Text
Figures
Tables
Table 1
| Search strategy for The Cochrane Library | |
|---|---|
| #1 | MeSH descriptor: [Vitamin D] explode all trees |
| #2 | MeSH descriptor: [Ergocalciferols] explode all trees |
| #3 | (“Calciferols”):ti,ab,kw OR (“D2, Vitamin”):ti,ab,kw OR (“Vitamin D2”):ti,ab,kw OR (“Ergocalciferol”):ti,ab,kw OR (“Vitamin D2”):ti,ab,kw |
| #4 | #2 OR #3 |
| #5 | MeSH descriptor: [Cholecalciferol] explode all trees |
| #6 | (“(3 beta,5Z,7E)-9,10-Secocholesta-5,7,10(19)-trien-3-ol”):ti,ab,kw OR (“Calciol”):ti,ab,kw OR (“Vitamin D 3”):ti,ab,kw OR (“Vitamin D3”):ti,ab,kw OR (“Cholecalciferols”):ti,ab,kw |
| #7 | #5 OR #6 |
| #8 | MeSH descriptor:[Calcitriol] explode all trees |
| #9 | (“Sitriol”):ti,ab,kw OR (“Rocaltrol”):ti,ab,kw OR (“1 alpha,25-Dihydroxyvitamin D3”):ti,ab,kw OR (“1,25-Dihydroxyvitamin D3”):ti,ab,kw |
| #10 | (“D3, 1 alpha,25-Dihydroxyvitamin”):ti,ab,kw OR (“1,25 Dihydroxyvitamin D3”):ti,ab,kw OR (“1 alpha,25-Dihydroxycholecalciferol”):ti,ab,kw |
| #11 | (“1 alpha,25 Dihydroxyvitamin D3”):ti,ab,kw OR (“1,25 Dihydroxycholecalciferol”):ti,ab,kw OR (“D3, 1,25-Dihydroxyvitamin”):ti,ab,kw |
| #12 | (“1,25-Dihydroxycholecalciferol”):ti,ab,kw OR (“Bocatriol”):ti,ab,kw OR (“Renatriol”):ti,ab,kw OR (“Calcitriol KyraMed”):ti,ab,kw |
| #13 | (“KyraMed, Calcitriol”):ti,ab,kw OR (“Osteotriol”):ti,ab,kw OR (“Calcijex”):ti,ab,kw OR (“Decostriol”):ti,ab,kw OR (“Tirocal”):ti,ab,kw |
| #14 | (“MC 1288”):ti,ab,kw OR (“MC1288”):ti,ab,kw OR (“MC-1288”):ti,ab,kw OR (“Calcitriol-Nefro”):ti,ab,kw OR (“Calcitriol Nefro”):ti,ab,kw |
| #15 | (“1,25-dihydroxy-20-epi-Vitamin D3”):ti,ab,kw OR (“1,25 dihydroxy 20 epi Vitamin D3”):ti,ab,kw OR (“D3, 1,25-dihydroxy-20-epi-Vitamin”):ti,ab,kw |
| #16 | (“1 alpha, 25-dihydroxy-20-epi-Vitamin D3”):ti,ab,kw OR (“1,25(OH)2-20epi-D3”):ti,ab,kw OR (“20-epi-1alpha,25-dihydroxycholecaliferol”):ti,ab,kw |
| #17 | (“Silkis”):ti,ab,kw OR (“Soltriol”):ti,ab,kw |
| #18 | #8 OR #9 OR #10 #11 OR #12 OR #13 #14 OR #15 OR #16 #17 |
| #19 | (“alfacalcidol”):ti,ab,kw OR (“1α-hydroxyvitamin D”):ti,ab,kw OR (“25-hydroxyvitamin D ”):ti,ab,kw OR (“calcidiol”):ti,ab,kw |
| #20 | #1 OR #4 OR #7 #18 OR #19 |
| #21 | MeSH descriptor: [Alopecia Areata] explode all trees |
| #22 | (“Alopecia Circumscripta”):ti,ab,kw |
| #23 | #21 OR #22 |
| #24 | MeSH descriptor: [Randomized controlled trial] explode all trees |
| #25 | (“Randomized controlled trial”):ti,ab,kw OR (“Randomized”):ti,ab,kw OR (“controlled”):ti,ab,kw |
| #26 | #24 OR #25 |
| #27 | #20 AND #23 AND #26 |
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