Effectiveness of oral vitamin D supplementation in lessening disease severity among patients with psoriasis: A systematic review and meta-analysis of randomized controlled trials
Ημερομηνία
2021Γλώσσα
en
Λέξη-κλειδί
Επιτομή
Objective: Many treatment modalities have been used to manage psoriasis; however, there is, to our knowledge, no pooled estimate for the effectiveness of oral vitamin D supplements in patients with psoriasis. Hence, the aim of the present study was to systematically review and meta-analyze the efficacy of oral vitamin D supplementation in lessening disease severity of patients with psoriasis. Methods: A systematic literature review was performed on the electronic databases PubMed, Embase, and Cochrane Central and the gray literature for retrieving randomized controlled trials comparing oral vitamin D supplementation with placebo. The primary outcome was the change of Psoriasis Area and Severity Index (PASI) score. We used the random effects model for synthesizing the evidence. Results: Of the total 5018 search results, 4 studies were included in the qualitative and 3 studies in quantitative analysis. Vitamin D supplementation was effective in ameliorating the PASI score after 6 mo of intervention (mean difference [MD] = –0.92, 95% confidence interval [CI] = –1.72 to –0.11). However, after the Hartung-Knapp adjustment, the results became non-significant (MD = –0.92, 95% CI = –2.21 to 0.38). Conclusions: A favorable effect of oral vitamin D supplementation in patients with psoriasis could not be verified. More randomized controlled trials with larger sample sizes are needed to produce robust results. © 2020 Elsevier Inc.
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