Table 1 Subject characteristics, WOMAC scores, and physical activity of TKA cohort and healthy controls

Age, years (mean, 95% CI)

66.7 (64.3 to 69.2)

65.0 (62.6 to 67.5)

0.333

Gender, female

56%

56%

Height, meters (mean, 95% CI)

1.67 (1.63 to 1.70)

1.66 (1.63 to1.68)

0.806

BMI (mean, 95% CI)

30.8 (27.6 to 34.9)

23.6 (22.2 to 27.3)

<0.001

Diagnosis of Osteoarthritis, n (%)

28 (87.5%)

0

Number of Co-morbidities, n (median, IQR)

2 (1 to 3)

0 (0 to 1)

<0.001

WOMAC Pain, max score 50 (median, IQR)

4 (1.0 to 11.9)

0 (0 to 0)

<0.001

WOMAC Function, max score 170, higher score worse function (median, IQR)

22.8 (10.2 to 60.5)

0 (0 to 2)

<0.001

Occasions of physical activity, n (median, IQR)

7 (2 to 11)

9 (6.5 to 13.5)

<0.001

Total duration of physical activity, minutes (median, IQR)

138 (40 to 305)

390 (280 to 615)

<0.001

Use of walking aid, n

3

0