Table 1. Demographic characteristics of recruited subjects.

	OA	Non-OA	HC
Number of subjects	31	19	57
Age (mean ± SD)	53.38 ± 14.72	50.05 ± 14.59	49.81 ± 12.94
Gender (male/female)	10/21	10/9	26/31

Note:

SD, standard deviation; OA, osteoarthritis; non-OA, non-osteoarthritis; HC, healthy control.