Figure 2
Forest plot for association between occupational Pb exposure and Blood lead levels. (Legends/footnotes): forest plot revealing the group mean differences of blood lead levels (BLL) in µg/dl between the occupationally Pb exposed workers and control participants (i.e. without obvious Pb exposure). The square and whisker (horizontal lines) represent respectively the mean difference and 95% confidence interval of individual studies. The length and width of the diamond indicate the pooled mean difference and 95% confidence interval derived from random-effect analysis.
