Table 1. Demographic and clinical characteristics of patients with knee osteoarthritis.

	n	%	Mean±SD	Median	Min-Max
Age (year)			63.0±9.6
Sex
Female	90	84,1
Male	17	15,9
Body mass index (kg/m2)			31.4±6.1
Duration of disease (month)				60	1-240
Calcium (mmol/L)				9,60	7.70-78.00
Vitamin D (ng/mL)				11,90	2.50-67.90
Lequesne Index			12.9±3.6
KOOS-PS				40,30	14.80-62.00
Visual Analog Scale-pain				7,00	4.00-10.00
Kellgren-Lawrence Grade
1	4	3,7
2	33	30,8
3	48	44,9
4	22	20,6
OARSI-JSN
1	22	20,6
2	52	48,6
3	33	30,8
OARSI-osteophytes
1	40	37,4
2	46	43,0
3	21	19,6
SD: Standard deviation; Min: Minimum; Max: Maximum; KOOS-PS: Knee Injury and Osteoarthritis Outcome Score-Physical Function Short-Form;  OARSI: Osteoarthritis Research Society International Atlas.