Table 3.

WOMAC scores before and after treatment in both groups

	Continuous SWD (n= 11)	Pulsed SWD (n= 16)	Total (n= 27)	P (between groups)	Between group Cohen’s d
Pretreatment WOMAC score Mean±SD Median; min- max	52.1 ± 18.1 54; 26-78	47.9 ± 15.3 45; 16-73	49.6 ± 16.3 48; 16-78	P= 0.521
Post treatment WOMAC score Mean±SD Median; min- max	38.4 ± 17.4 34.0; 6-65	36.9 ± 18.4 35.5; 2-71	37.5 ± 17.7 34.0; 2-71	P=0.805	0.084
1 month post treatment WOMAC score Mean±SD Median; min- max	37.4 ± 20.3 39.0; 2-62	37.4 ± 23.1 38; 0-76	37.4 ± 21.6 38; 0-76	P=0.921	0
P within groups	p=0.060	P= 0.003	P=0.000

See table 1 for abbreviations

WOMAC MCID >12% of baseline score

Cohens d 0.2= small effect size

Cohen’s d 0.5= medium effect size

Cohen’s d 0.8= large effect size