Internal Fixation or Joint Replacement Therapy for Aged Hip Fracture Patients

Inclusion Criteria: * Intertrochanteric fractures of the femur need surgery * Male and female, age more than 75 years old * Combined with more than one medical complication, including hypertension, cerebral infarction, respiratory failure, renal insufficiency, coronary heart disease, diabetes, heart failure, pulmonary infection, heart rate, water and electrolyte disorders * The patient is still able to tolerate surgery through the anaesthesia and related department assessment * Signed written informed consent Exclusion Criteria: * No complications associated with internal medicine * Mild fracture displacement and conservative treatment required * Multiple trauma involving more than one organ system * Known to have progressive malignant neoplasms * It is not possible for the subjects to follow the test scheme, such as uncooperative attitudes, inability to return to the research centre for follow-up visits and inability to complete the study