TABLE 1.

Inclusion and exclusion criteria of data collection.

	Inclusion criteria	Exclusion criteria
1	Patients were adults (age >18 years old)	Juvenile patients (age <18 years old)
2	No other hip fractures were associated (such as the fractures of the femur, neck, femur head, and proximal femur that did not involve intertrochanteric areas)	Other hip fractures were associated
3	The preoperative anteroposterior X-ray was available and standard without any improper position, overexposure, ghosting, and shelters, such as plaster, splint, and metal objects on clothes	The preoperative anteroposterior X-ray was not performed in the hospital or no standard