Table 4.

Median (25th and 75th percentiles) concentration of platelet-derived growth factor-ββ (PDGF-ββ) released into the supernatant following treatment.

Group	Concentration (pg/mL)	Increase relative to negative control (%)
Positive	4,107 (3,718–4,229)	1,295 (1,051–4,017)
Extracorporeal shockwave therapy (ESWT)-S	566 (408–724)	219 (86–418)
ESWT-P	405 (331–593)	190 (57–340)
Negative	174 (94–307)

Relative increases of growth factor concentrations compared with negative (resting) controls are also listed.