Department of Orthopedic Surgery,Kyungpook National University Hospital,Daegu 41944,South Korea;
Department of Orthopedic Surgery,School of Medicine,Kyungpook National University,Daegu 41944,South Korea;
Department of Orthopedic Surgery,Goodssen Hospital,Daegu 42010,South Korea;
Pertrochanteric fracture; Proximal femoral nail; Proximal femoral nail antirotation; Sliding distance; Cutout; Outcome;