Table 1 Characteristics of patients with knee osteoarthritis (n = 63)
Mean (SD)Rangen (%)
Sex
    Female48 (76)
    Male15 (24)
Age, years60 (7.5)45–79
Body mass index, kg/m230.2 (6.5)22.4–56.6
Duration of symptoms, years5.7 (7.6)1–47
WOMAC-pain score11.2 (6.1)0–32
WOMAC-stiffness score4.0 (1.9)0–8
WOMAC-physical function score29.7 (14.1)4–56
Walking time (s)97.5 (35.6)49.7–97.5
GUG time (s)13.6 (7.0)6.9–43.0
Varus–valgus range of motion (°)
Left knee3.49 (1.72)0.38–8.01
Right knee2.98 (1.74)0.75–8.21
Mid-stance varus–valgus position (°)
Left knee3.02 (1.79)−2.84 to 7.16
Right knee1.37 (2.72)−6.39 to 6.12
Isokinetic quadriceps strength, Nm/kg
    Left knee0.97 (0.61)0.08–2.78
    Right knee1.02 (0.59)0.09–2.66
Isokinetic hamstring strength, Nm/kg
    Left knee0.65 (0.34)0.04–1.54
    Right knee0.69 (0.35)0.08–1.90
Muscle strength averaged L/R and Ex/Fl0.83 (0.45)0.08–1.98
K&L grade, no of knees
    Right (n = 62)
        Grade 00
        Grade 145 (71)
        Grade 210 (16)
        Grade 36 (11)
        Grade 41 (2)
    Left (n = 63)
        Grade 02 (3)
        Grade 139 (62)
        Grade 29 (14)
        Grade 311 (18)
        Grade 42 (3)
  • GUG, Get Up and Go test; K&L grade, Kellgren and Lawrence score of knee OA; WOMAC, Western Ontario and MacMasters Universities Osteoarthritis Index.