Patients with paid work (n=181) | All patients (N=381) | |||
Paid work productivity loss (n=36) | No paid work productivity loss (n=145) | Unpaid work productivity loss (n=171) | No unpaid work productivity loss (n=210) | |
General patient characteristics | ||||
Age (years) | 55 (6) | 56 (6) | 61 (8) | 61 (9) |
Sex (female), n (%) | 28 (78) | 122 (84) | 159 (93) | 161 (76) |
BMI (kg/m2) | 28.2 (7.5) | 27.3 (4.8) | 28.6 (5.6) | 26.9 (4.2) |
Living with a partner, n (%) | 28 (78) | 124 (76) | 144 (84) | 168 (80) |
Education, high,§ n (%) | 11 (31) | 46 (32) | 34 (19) | 67 (32) |
Hand-specific characteristics | ||||
Fulfilling ACR hand OA criteria, n (%) | 29 (81) | 124 (86) | 157 (92) | 187 (88) |
Erosive hand OA, n (%) | 8 (23) | 27 (19) | 43 (25) | 70 (33) |
Symptom duration (years)* | 4.3 (1.2–11.6) | 4.2 (1.6–8.2) | 6.1 (1.6–14.6) | 4.8 (2.1–10.4) |
AUSCAN hand pain (0–20) | 11 (4) | 8 (5) | 11 (4) | 8 (4) |
AUSCAN hand function (0–36) | 19 (8) | 13 (8) | 19 (8) | 13 (8) |
Tender joint count (0–30)* | 6 (2–9) | 2 (1–5) | 6 (2–9) | 3 (1–6) |
KL summated score (0–120)* | 13 (5–21) | 12 (5–21) | 13 (5–21) | 17 (8–9) |
General burden | ||||
Any comorbidity present, n (%) | 19 (53) | 69 (48) | 109 (64) | 100 (47) |
Amount of comorbidities* | 1 (0–1) | 1 (0–1) | 1 (0–2) | 0 (0–1) |
Fulfilling ACR hip OA criteria, n (%) | 5 (14) | 4 (3) | 14 (8) | 16 (8) |
Fulfilling ACR knee OA criteria, n (%) | 15 (42) | 38 (26) | 57 (34) | 70 (33) |
HADS total score (0–42)* | 7 (5–12) | 6 (3–11) | 7 (4–14) | 6 (3–10) |
Work characteristics | ||||
Retired, n (%) | – | – | 46 (28) | 70 (33) |
Full work disability, n (%) | 3 (8) | 2 (1) | 6 (3) | 3 (1) |
Full work disability due to hand OA, n (%) | 0 (0) | 0 (0) | 3 (2) | 3 (2) |
Partial work disability, n (%) | 3 (8) | 5 (3) | 6 (3) | 6 (3) |
Partial work disability due to hand OA, n (%) | 1 (3) | 3 (2) | 2 (1) | 4 (2) |
Unpaid work replacement, n (%) | 20 (56) | 53 (37) | – | – |
Paid work productivity loss, n (%) | – | – | 16 (9) | 20 (10) |
Predominantly manual profession†, n (%) | 1 (3) | 10 (7) | 7 (4) | 19 (9) |
Numbers represent mean (standard deviation) unless otherwise specified.
*Median (IQR).
†Defined as a score of 5 or 6 on the scale by de Zwart et al.26
§Defined as having completed university level education
ACR, American College of Rheumatology; AUSCAN, Australian Canadian Osteoarthritis Hand Index; BMI, body mass index; HADS, Hospital Anxiety and Depression Scale; KL, Kellgren-Lawrence; OA, osteoarthritis.