Fig. 3

This figure is a schematic showing the method of calculating LLD. LLD is measured as the difference in the distance from the line joining the bottom edges of the two teardrops to the tip of each LT. Use the distance on the affected side (d1) minus the distance on opposite side (d2). HCOR was measured as the distance from the center of the femoral head to the vertical line passing through the inner edge of the ipsilateral teardrop. VCOR was measured as the distance from the center of the femoral head to the “inter-teardrop” line. FO was the perpendicular distance from the center of the femoral head to the longitudinal axis of the femur. Δ means the affected side distance minus the contralateral distance