Increasing the angle between caudal screw and the transverse plane may aggravate the risk of femoral head necrosis by deteriorating the fixation stability in patients with femoral neck fracture

Table 3 The cut-off value, sensitivity and specificity for femoral head necrosis prediction

	Stability status	Cross angle	Absolute value of cross angle
Cut-off value	1.5	− 0.5	6.5
Sensitivity	0.724	0.724	0.422
Specificity	0.489	0.544	0.724
AUC	0.607	0.661	0.545

ISSN: 2047-783X