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Table 1 Descriptives of the study population (N = 6810), predictors, crude and adjusted odds ratios (OR) with 95% confidence intervals (95% CI)

From: Health enhancing physical activity in patients with hip or knee osteoarthritis - an observational intervention study

Predictor Mean (SD) Group % Crude OR (95% CI) Adjusted OR (95% CI)
Time n.a. 0 month n.a. 1.00 1.00
3 month n.a 0.83 (0.77–0.88) 0.78 (0.72–0.84)
12 month n.a 1.07 (1.00–1.15) 1.10 (1.02–1.19)
Age 65 (9) 22–54 years   1.00 1.00
55–64 years   0.75 (0.65–0.85) 0.74 (0.64–0.85)
65–74 years   0.50 (0.44–0.57) 0.47 (0.42–0.54)
75–100 year   0.78 (0.67–0.91) 0.64 (0.55–0.75)
Charnley categorya n.a. A 35 1.00 1.00
B 31 1.05 (0.94–1.17) 1.00 (0.90–1.11)
C 33 1.38 (1.25–1.53) 1.15 (1.04–1.28)
BMI 28 (5) Normal weight   1.00 1.00
Overweight   1.39 (1.25–1.56) 1.27 (1.14–1.42
Obesity   2.36 (2.10–2.65) 1.93 (1.71–2.17)
Gender n.a. Man 27 1.00 1.00
Woman 73 0.80 (0.73–0.88) 0.69 (0.62–0.75)
  1. n.a.not applicable
  2. aCharnley category A: One joint with osteoarthritis (knee or hip). B: Bilateral osteoarthritis (both knees or both hips) C: Osteoarthritis in multiple joint sites (hip and knee), or presence of any other disease that affects walking ability