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Table 1 Baseline characteristics of the study populationa

From: Economic evaluation of telephone-based weight loss support for patients with knee osteoarthritis: a randomised controlled trial

Demographic characteristics

Intervention group (n = 59)

Control group (n = 60)

Age (years)

63.0 (11.1)

60.2 (13.9)

Gender (male), n (%)

20 (34)

25 (42)

Aboriginal and/or Torres Strait Islander, n (%)

5 (9)

2 (3)

Employment status, n (%)

 Employed

12 (20)

14 (23)

 Unemployed

7 (12)

8 (13)

 Retired

31 (53)

28 (47)

 Can’t work (health reasons)

9 (15)

10 (17)

Country of origin (Australia), n (%)

54 (92)

51 (85)

Highest level of education (>High school), n (%)

11 (19)

17 (28)

Private health insurance, n (%)

1 (2)

5 (8)

Current time on the waiting list for orthopaedic consultation (days), median (IQR)

379.0 (279.0–507.0)

390.0 (313.0–532.0)

Clinical characteristics

Pain intensity (NRS)

6.9 (1.8)

6.8 (2.0)

Pain duration (years)

9.6 (10.6)

6.7 (8.5)

Disability (WOMAC)

47.9 (17.4)

48.6 (16.5)

Self-reported weight

93.3 (12.9)

89.5 (13.5)

Subjective BMI

33.4 (3.4)

32.1 (3.1)

Utility score

0.6 (0.1)

0.7 (0.1)

Healthcare utilisation, n (%)b

47 (80)

50 (83)

  1. IQR Interquartile range
  2. aData presented as mean (SD) unless otherwise indicated
  3. bHealthcare utilisation includes healthcare visits and medication use for knee pain