Fig. 3
Forest plot of mRS comparing the stem cell group and the control group for RCTs and NRSs. a Participants in the stem cell group had a trend beneficial effect in RCTs (MD − 0.41, 95% CI − 0.82 to − 0.00, I2 = 67%). b Participants in stem cell group had no beneficial effect in NRSs (MD − 0.81, 95% CI − 0.68 to 0.32, I2 = 0%)