Table 1. Demographic and clinical characteristics of patients.

Treatment	ESWT (n=32)			Injection (n=28)			p
	n	%	Mean±SD	n	%	Mean±SD
Age (year)			50.0±9.1			51.7±7.7	0.45*
Body mass index (kg/m2)			27.9±4.2			27.4±3.3	0.618*
Sex
Male	5	41.7		7	58.3		0.52
Female	27	56.3		21	43.8		0.82**
Education
Primary-Secondary School	17	50		17	50		1.339**
High School	8	50		8	50		0.512
College-University	7	70		3	30
Occupation
Not working	18	48.6		19	51.4		1.019**
Employee	5	55.6		4	44.4
Desk job
Comorbidity	9	64.3		5	35.7		0.601
No	16	55.2		13	44.8		3.201**
At least one	13	46.4		15	53.6		0.202
More than one	3	100		0	0
Smoking
No	21	50		21	50		0.625**
Yes	11	61.1		7	38.9		0.574
ESWT: Extracorporeal shock wave therapy; SD: Standard deviation; * Independent samples t-test; ** Chi-square test was used.