Table 1.

Distribution of patients and HVs

Disease type	Age, years	Females, %	Total number in category
RA	50.7, 33–75, 11.4	72	18
PA	47.5, 32–63, 15.5	100	2
OA	60.7, 55–70, 4.5	60	10
HV	48, 31–71, 13.6	66	15

Age is given as the mean, range, and STD. RA, rheumatoid arthritis; PA, psoriatic arthritis; OA, osteoarthritis; HV, healthy volunteer.