Participants
All participants were 40 to 75 years
of age. The participants in the control
group were asymptomatic and
had no history of knee problems.
The participants with OA were diagnosed
with unilateral medial or lateral
compartment tibiofemoral OA
on the basis of a flexed-knee radiograph
that was graded by a single
rheumatologist. People were
excluded if they had any other