Fig. 4

Mean difference (with 95% CI) for RCT continuous outcomes (Pain VAS 0–100). *Two or more studies required to calculate I2 statistic; #UG single injection and NUG three injections outcome data combined; VAS visual analogue scale; MD mean difference; CI confidence interval; UG ultrasound guided; NUG non-ultrasound guided; ESWT extracorporeal shock wave therapy