Fig 1.
Flowchart of literature screening process.
Table 1.
Basic characteristics of included literatures.
Table 2.
Demographics and clinical characteristics of included studies.
Fig 2.
Risk of bias evaluation of included studies.
Fig 3.
Forest plot of the change in psoriasis area and severity index (PASI):(A)3 mouths, (B) 6 mouths, (C) at the end of follow-up, (D) subgroup of Vitamin D type at the end of follow-up,and (E) subgroup of patient population at the end of follow-up.
Fig 4.
Sensitivity analysis of change in PASI: (A) 3 mouths, (B) 6 mouths, and (C) at the end of follow-up.