Figure 1

Forest plots estimating the effect of VDR polymorphisms on the risk of tobacco-related cancers. (a) FokI polymorphism, (b) BsmI polymorphism, (c) ApaI polymorphism, (d) TaqI polymorphism. The estimate of the OR (odds ratio of the polymorphic form with respect to wild type – WT) and its 95% CI are plotted with a box and a horizontal line, respectively. Filled boxes: pooled OR and its 95% CI.