Table 1. Demographic characteristics of patients.

	Experimental group (n=21)			Interventional group (n=20)
	n	%	Mean±SD	n	%	Mean±SD	p
Age (year)			52.7±9.6			51.4±9.2	0.661*
Height (cm)			169.2±11.4			168.4±8.6	0.802*
Weight (kg)			78.6±11.2			75.8±11.6	0.428*
BMI (kg/m2)			27.5±5.3			26.6±2.6	0.522*
Duration of pain (month)			37.5±16.6			34.6±15.4	0.571*
Sex							0.867†
Female	10	47.6		9	45.0
Male	11	52.4		11	55.0
Education							0.992†
Primary school	13	61.9		12	60
High school	6	28.6		6	30
University	2	9.5		2	10
SD: Standard deviation; n: Numbers of participants; * Significance level for t-test, † Significance level for chi-square test.