Table 1.

Changes on MRI after ESWT compared to no ESWT

Study	ESWT	No ESWT	Between group difference
Gao et al. [1]	After 6 months: Reduction in 35% Complete regression in 65% After 12 months: Complete regression in 100%	After 6 months: Reduction in 40% Complete regression in 25% After 12 months: Complete regression in 90%	Significant superiority of ESWT after 6 months (p = 0.018)
Schöberl et al. [17]	After 3 months: Grading 1.5	After 3 months: Grading 1.5	n.s.
Kang et al. [4]	After 3 months: Reduction in 90.2% of patients After 6 months: Reduction in 95.1% of patients After 12 months: Reduction in 100% of patients	After 3 months: Reduction in 61.4% of patients After 6 months: Reduction in 79.5% of patients After 12 months: Reduction in 97.7% of patients	After 3 months: Significant superiority of ESWT (p < 0.001) After 6 months: Significant superiority of ESWT (p = 0.006) After 12 months: n.s.
Sansone et al. [6]	After 6 months: 88% reduction	After 6 months: 41% reduction	Significant superiority of ESWT after 6 months (p < 0.001)
Vitali et al. [3]	After 4 months: 77% reduction	After 4 months: 40% reduction	Significant superiority of ESWT after 6 months (p < 0.00001)

ESWT extracorporeal shock wave therapy, n.s. not significant