Fig. 4From: The lateral joint line opening: a radiographic indicative parameter for high grade varus kneesIn this graph, the lateral opening (measured in mm) is plotted against the JLCA (measured in degrees). A positive correlation is found between the two variables. However, a difference in gradient is clearly seen with the cut-off point being 4.7 mm. The gradient beyond this point is almost double that compared to the gradient before this point Back to article page