Table 1.

Baseline characteristics of cohorts.

Patient CharacteristicsHOSTAS, n = 510EHOA, n = 23ECHO, n = 47Healthy Controls, n = 196
Age, yrs, mean ± SD61.0 ± 8.657.1 ± 7.063.4 ± 9.244.1 ± 13.9
Women, %85.773.989.451.0
BMI, kg/m2, mean ± SD27.1 ± 4.7, n = 49626.3 ± 4.727.4 ± 4.5, n = 4523.7 ± 3.0, n = 195
Ever smoker, % (former/current)64.9 (323/498)65.233.3 (15/45)34.9 (68/195)
Fulfilling ACR criteriaa, %90.0100100
  • a American College of Rheumatology classification criteria for hand OA. BMI: body mass index; OA: osteoarthritis; EHOA: erosive hand OA.