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Table 1 Baseline characteristics of participants (N = 397)

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

  1. PHQ-9 Patient health questionnaire depression scale; WOMAC Western Ontario and McMaster Universities Arthritis Index