Table 1

Clinical characteristics of the study population

Hand OA group (n = 128)Control group (n = 70)
Age, mean (SD) years63.7 (12.1)54.6 (13.3)
Sex, n (%) women113 (88.3)53 (75.7)
Body mass index, median (IQR) kg/m2*24.6 (22.1–28.6)26.1 (22.1–29.0)
AUSCAN*

  • Pain (range: 0–20)

8 (5–12)8 (3–12)

  • Stiffness (range: 0–4)

2 (1–3)2 (1–3)

  • Physical function (range: 0–36)

17 (10–24)15 (15–25)
FIHOA (range: 0–30)*7 (3–12)5 (2–13)
Symptom duration in fingers

  • No response/not applicable

12 (9.4)3 (4.3)

  • <6 weeks

2 (1.6)7 (10.0)

  • 6 weeks to 6 months

6 (4.7)7 (10.0)

  • >6 months

108 (84.4)53 (75.7)
Symptom duration in thumb base

  • No response/not applicable

36 (28.1)28 (40.0)

  • <6 weeks

7 (5.5)3 (4.3)

  • 6 weeks to 6 months

6 (4.7)5 (7.1)

  • >6 months

79 (61.7)34 (48.6)

  • *Missing information about body mass index (n = 1), FIHOA (n = 20) and AUSCAN (n = 7) in the hand OA group. Missing information about FIHOA (n = 9) and AUSCAN (n = 1) in the control group.

  • AUSCAN, Australian/Canadian hand index; FIHOA, Function Index of Hand OA OA, osteoarthritis.