Table 1

Demographic and clinical characteristics of the 291 participants

Age, median (IQR) years61 (57–66)
Women, n (%)257 (88)
Fulfilment of ACR hand OA criteria, n (%)271 (93)
Duration of symptoms, median (IQR) years*6 (3–13)
Body mass index, mean (SD) kg/m226.4 (4.8)
Assessor-reported tender hand joint count (0–30), median (IQR) joints7 (4–11)
Self-reported painful hand joint count (0–30), median (IQR) joints4 (2–8)
Self-reported painful total body joint count (0–18), median (IQR) joints4 (2–8)
Presence of widespread pain, n (%)104 (35.7)
PPT painful finger joint, mean (SD) kg/cm23.9 (1.9)
PPT tibialis anterior muscle, mean (SD) kg/cm25.5 (2.6)
Temporal summation, median (IQR)1 (0–2)
Educational level, n (%) with university or other higher education*168 (58)
Sleep disturbances, n (%) with moderate to extreme sleep impairment*119 (41)
Regular use of analgesics, n (%)45 (15)
HADS total score (0–42), median (IQR)*6 (3–10)
PCS total score (0–52), median (IQR)*9 (5–15)
Kellgren-Lawrence sum score (0–128), median (IQR)28 (16–43)
Sum score of ultrasound-detected osteophytes in bilateral hips, knees and ankles/feet (0–18), median (IQR)4 (2–7)
  • *Missing values: duration of symptoms n=21, educational level n=1, sleep disturbances n=1, HADS total score n=9, PCS total score n=4.

  • ACR, American College of Rheumatology; HADS, Hospital Anxiety and Depression Scale; PCS, Pain Catastrophizing Scale; PPT, pressure pain threshold.