Figure 2.

Relationship between urinary CTX-II levels and minimal joint space width (JSW) in patients with hip osteoarthritis (OA). The left panel shows the correlation between logarithmic transformed urinary CTX-II levels (x axis) and minimum joint space width of the hip (y axis). In the right panel, patients with hip OA were categorised into those with low and high urinary CTX-II levels using as a cut off point the mean + 1SD of healthy controls. The bars represent the mean value (SEM) of the minimal JSW in patients with low or high urinary CTX-II levels.