Additional file 1. Comparison between pre and post-operatively HOOS. The five panels from the left clockwise show the HOOS subscales: symptoms, pain, function, activity limitations in sport and hip related quality of life (QOL). The last panel on the bottom right shows the pre and post-operatively total HOOS. (* p < 0.05; ** p < 0.01). Scale 0-100, worst to best.