Question: fig 2 pooled weighted mean differences in weight reduction between...
Fig. 2 Pooled weighted mean differences in weight reduction between vegetarian and non-vegetarian diets. Effects on estimated weight reduction
for each study depicted as solid squares; error bars indicate 95%CIs. The pooled estimate of −1.99 kg (95%CI, −2.72 to −1.25) of weight loss is
shown as the diamond. RE random effect, Weight inverse variance weight, WMD weighted mean difference, CI confidence interval: What does this means?