[Retracted] Clinical Effect of Open Reduction and Internal Fixation for Femoral Neck Fracture in Young Adults and Related Factors of Femoral Head Necrosis

Table 4

Clinical risk factors for necrosis of the femoral head.

Indexes		Avascular necrosis of the femoral head	Number of cases (35)	Nonavascular necrosis of the femoral head	Number of cases (35)
Gender	Male	25		75		3.524	<0.05
	Female	10		70
Age	<40 years	15		68		0.458	>0.05
	≥40 years	20		77
Cause of injury	Hit	20		76		0.771	>0.05
	Fall	15		69
Garden type	I/II	10		67		3.452	<0.05
	III/IV	25		78
Postoperative weight-bearing time	<3 months	25		55		3.123	<0.05
	≥3 months	10		90