Patients are included from the division of hip surgery at Aarhus University Hospital using the listed inclusion and exclusion criteria's. The patients complete the HAGOS questionnaire after informed written consent. Wiberg's center-edge (CE) angle, Tönnis' acetabular index (AI) angle, and osteoarthritis grade are measured on anteroposterior radiographs after inclusion and after surgery by the surgeon. Information from the hospital charts is used to record age, gender, unilateral or bilateral involvement and other pathologies. Baseline characteristics are registered using standardized questions including data on BMI, duration of pain and intake of analgesia. Pain is afterwards measured on 100 mm visual analogue scale (VAS) resting in sitting and lying, and furthermore registered on a pain drawing. Preferred physical activity and hours spend on primary and overall physical activity is registered using standardized questions.