Fig. 2
From: Regenerate bone stimulation following limb lengthening: a meta-analysis
Forest-plot demonstrating the healing index between both cohorts. Forest-plot showing the effects of LIPUS or PEMF treatment on mean healing index. Each square represents the size of the study while bars represent confidence intervals. The diamond at the bottom of the graph shows the average effect size with a random effect model of the four studies; the lateral tips of the diamond represent the associated confidence interval. Note that a standardized mean difference lower than zero (0), favors stimulation (less time for bone healing)