Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12871-015-0063-3/MediaObjects/12871_2015_63_Fig3_HTML.gif)
Forest plot of pooled odds ratio of included studies comparing vitamin D deficiency (<20 ng/mL) and optimal groups (>30 ng/mL). CI, confidence interval; Vit D, vitamin D
Forest plot of pooled odds ratio of included studies comparing vitamin D deficiency (<20 ng/mL) and optimal groups (>30 ng/mL). CI, confidence interval; Vit D, vitamin D