Figure 2. (A) Measurements of ischial angle (IA) and femoral neck angle (FNA). IA is the angle between the long axis of the ischiopubic ramus (dotted line) in reference to the horizontal plane (solid line); (B) Two circles were placed, one at the medial and one at the lateral aspect of the femoral neck, encompassing the entire space between the anterior and posterior femoral cortex, and a line passing through the midpoints of the circles was drawn. FNA is the angle between this line (dotted line) and the horizontal plane (solid line).