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

From: The six-minute walk test is an excellent predictor of functional ambulation after total knee arthroplasty

   TKA (n = 32) Controls (n = 43)  P
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  
  1. Abbreviations:
  2. BMI = Body mass index; CI = Confidence interval; IQR = Inter-quartile range; N = number; TKA = Total knee arthroplasty; WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index.