Fig. 2

Forest plot showing the quantitative synthesis of fasting blood glucose (a), serum ferritin (b), creatine kinase (c), transferrin saturation coefficient (d) and total iron binding capacity (e) in amyotrophic lateral sclerosis patients and controls. Values and the corresponding 95% confidence intervals of individual studies are indicated by short solid lines. The weighted mean difference (WMD) and 95% confidence intervals are indicated by diamonds