1. Vitamin D deficiency in patients with chronic and acute urticaria: A systematic review and meta-analysis 
Tsung-Yu Tsai, MD, Yu-Chen Huang, MD 
Journal of the American Academy of Dermatology 
Volume 79, Issue 3, Pages (September 2018)
DOI: /j.jaad
Copyright © 2018 American Academy of Dermatology, Inc. Terms and Conditions

2. Fig 1
Forest plot showing that patients with urticaria had a significantly higher prevalence of 25-hydroxyvitamin D deficiency than those in the control group. (Odds ratio 4.456, 95% CI , I2 = 72.6%.) CI, Confidence interval.
Journal of the American Academy of Dermatology  , DOI: ( /j.jaad )
Copyright © 2018 American Academy of Dermatology, Inc. Terms and Conditions

3. Fig 2
Forest plot showing that patients with urticaria had a significantly lower level of 25-hydroxyvitamin D than those in the control group. (std diff in means −1.211, 95% CI −1.832 to −0.591, I2 = 98.5%.) CI, Confidence interval; diff, difference; std, standardized.
Journal of the American Academy of Dermatology  , DOI: ( /j.jaad )
Copyright © 2018 American Academy of Dermatology, Inc. Terms and Conditions