Prognosis Model Age at Surgery Sex Male Female Body Mass Index Pre NAHS Score Pre mHHS Score Revision Yes No Workers Comp Yes No MRI Gluteus Medius Pathology Yes No MRI Chondral Damage Yes No MRI Subchondral Cyst Acetabulum Yes No Tonnis Grade 0 1 2 3 Crossover Yes No Lateral Center Edge Angle <18 18-25 25-40 >40 Joint Space Medial Joint Space Lateral Neck Shaft Angle (per degree) Alpha Angle (per degree) Pre-Operative Fitness Level Recreational Amateur Highschool College Professional None Unknown Gait Normal Antalgic Trendelenburg Other Unknown Submit Preservation Rate (%) Revision Incidence (%) One Year