From: Depression in patients with knee osteoarthritis: risk factors and associations with joint symptoms
 | Mean/ Numbers | SD/ Percentage |
---|---|---|
Age (years) | 63.3 | 7.1 |
Female sex (n, %) | 193 | 48.6 |
Body mass index (kg/m2) | 29.6 | 4.9 |
Serum 25-(OH)D levels (nmol/L) | 43.7 | 12.2 |
Treatment group (n, %) | 201 | 50.6 |
PHQ-9 score | ||
 0–4 | 296 | 74.6 |
 5–9 | 70 | 17.6 |
  ≥ 10 | 31 | 7.8 |
Anti-depressant medication use (n, %) | 17 | 4.3 |
Education | ||
 School only (n, %) | 49 | 12.4 |
 High school (n, %) | 96 | 24.4 |
 University or higher (n, %) | 249 | 63.2 |
Work status | ||
 Full-time employed (n, %) | 114 | 28.9 |
 Part-time/causal employment (n, %) | 83 | 21.0 |
 Unemployed/home duties/retired (n, %) | 198 | 50.1 |
Work type | ||
 Manual (n, %) | 128 | 32.8 |
 Office/professional (n, %) | 262 | 67.2 |
WOMAC score | ||
 Pain (0–500) | 136.4 | 87.0 |
 Function (0–1700) | 477.9 | 30.9 |
 Stiffness (0–200) | 62.0 | 40.7 |
Multi-site joint pain, (n, %) | ||
 No pain | 240 | 60.5 |
 One site | 133 | 33.5 |
 More than one site | 24 | 6.0 |
Comorbidity, (n, %) | ||
 No comorbidity | 162 | 40.8 |
 One comorbidity | 221 | 55.7 |
 More than one comorbidity | 14 | 3.5 |