Fig. 3From: The lateral joint line opening: a radiographic indicative parameter for high grade varus kneesIn this graph, the lateral opening (measured in mm) is plotted on the X-axis and the HKA (measured in degrees) on the Y-axis. The corresponding mean HKA for a lateral opening of 4.7 mm is 5.95 with a 95% CI [5.45; 6.45]Back to article page