Fracture risk factors have long been identified as key factors in osteoporosis and fragility fractures. The WHO recommended Fracture risk assessmenttool (FRAX) applies clinical risk factors to assess the absolute risk of osteoporotic fractures in each individual. Our preliminary study suggests that FRAX estimates may underestimate the risk of fractures in the Chinese population. In order to optimize the risk prediction model of osteoporotic fractures, a treatment threshold and its optimal cutting point were initially established based on the data of the health management Center of the Second Xiangya Hospital of Central South University.

Inclusion Criteria:

• Dual-energy X-ray bone mineral density measurement was performed in the health management center of our hospital in the physical examination subjects over 40 years old. Have independent civil capacity and agree to participate, and sign informed consent

Exclusion Criteria:

• Under 40 years of age， Patients who had undergone hip replacement or lumbar surgery and could not perform dual-energy X-ray BMD testing; Patients who have been treated with effective anti-osteoporosis drugs or have a history of malignant tumors.

Dual-energy X-ray bone mineral density measurement was performed in the health management center of our hospital in the physical examination subjects over 40 years old