TABLE 1.

Cohort demographics

JoCo OA indicates a subset of 450 subjects from the Johnston County Osteoarthritis project.

	BAJA	JoCo OA	Human cartilage
N (% female)	14 (36%)	450 (54%)	26 (42%)
Age mean ± S.D. years (range)	63.4 ± 13.2 (44–81)	58.88 ± 9.62 (44–86)	71.3 ± 10.0 (52–90+)
No OA (N)	0	164	11
Hip OA without knee OA (N)	4	143	11
Knee OA without hip OA (N)	10	79	15
Hip and knee OA (N)	0	64	N/A