Table 2. Results of WOMAC pain from patients at the beginning of treatment (WD pre), and six months after (four months after classes) (WD post). Difference between WOMAC pain values (DWD). Comparison between data pre-and post- treatment.

	WD pre	WD post	DWD
Mean	8,7	8,2	-0,4
Standard deviation	0,6	0,6	0,6
Median	9	8	-0,5
Standard deviation	3,4	4	4
Minimum	2	0	-9
Maximum	16	17	7
Number	38	38	38

Wilcoxon test p=0.2403