Fig. 6From: Association of vitamin D in individuals with periodontitis: an updated systematic review and meta-analysisForest plot of studies evaluating the effect of SRP + vitamin D versus SRP (before SRP versus after SRP). A SRP + vitamin D VS SRP. B Before SRP VS after SRP. Gao, W-1: Gao, W-2000 IU/d vitamin D; Gao, W-2: Gao, W-1000 IU/d vitamin D; SRP: scaling and root planing. SMD: standardized mean difference; a: RCT; b: Non-RCTBack to article page