Fig. 3From: Factors influencing inconsistent leg length discrepancy in dysplastic hip osteoarthritis: a retrospective studyMeasurement of grovel femoral offset (GFO). The preoperative GFO was measured by adding the distance between the longitudinal axis of the femur and the centre of the femoral head (A) to the distance between the centre of the femoral head and a perpendicular line passing through the pubic symphysis (B). GFO was defined as A + BBack to article page