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 1 Significant comparison between variates for patients with and without femoral head necrosis

	Without femoral head necrosis	With femoral head necrosis	P value
Age	50.53 ± 9.39	51.28 ± 13.14	0.739
Sex (male/female)	40/50	11/18	0.538
BMI	21.51 ± 2.75	21.69 ± 3.06	0.765
stability status (Pauwels angle < or ≥ 50°)	44/46	8/21	0.044*
Cross angle	− 1.49 ± 6.62	2.07 ± 5.34	0.01*
Absolute value of cross angle	5.38 ± 4.1	4.55 ± 3.39	0.328

ISSN: 2047-783X