Figure 2.

Meta-analysis. To compare the different scales used to measure identical outcome parameters in the included studies, we calculated the standardized mean difference (SMD) and calculated the DM afterwards in accordance with the Cochrane Handbook for Systematic Reviews. Shown are the standardized mean differences of walking track performance of animals treated with an ultrasound intensity of 200–300 mW/cm² compared to sham or untreated animals four weeks following axonotmetic nerve injury and four weeks following implantation of biodegradable synthetic nerve conduit or reverse autograft.