Fig. 4.

Forest plot showing relative risk of cardiovascular mortality for a 10 µmol/l increment in circulating α-tocopherol concentration. The study-specific effect size (ES) and 95 % CI are represented by the black square and horizontal line, respectively; the area of the black square is proportional to the specific-study weight to the overall meta-analysis. The centre of the blue open diamond and the vertical dashed line represent the pooled ES, and the width of the blue open diamond represents the pooled 95 % CI