Fig. 4From: Aberrations of biochemical indicators in amyotrophic lateral sclerosis: a systematic review and meta-analysisForest plot showing subgroup analysis of serum ferritin (a) and creatine kinase (b) based on sex. M: male group, F: female group, Total: combined male and female patients. 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 diamondsBack to article page