Corrections in alpha angle following two different operative approaches for CAM-type femoral acetabular impingement - Ganz surgical hip dislocation vs anterior mini-open

Table 1 Comparison of age and alpha angles for gender and surgery approach

	n	Mean age (SD)	Mean pre-op angle (SD)	Mean post-op angle (SD)
Overall	79	35.9 (10.7)	94.0 (11.0)	46.0 (5.0)
Male gender2	47	35.3 (9.5)	92.1 (11.6)	45.9 (4.9)
Female gender	32	36.7 (12.3)	96.7 (9.5)	46.6 (5.6)
P value		0.61	0.14	0.28
Mini open	47	37.3 (11.1)	99.4 (7.2)	43.8 (4.3)1
Ganz surgical dislocation	32	33.8 (9.8)	88.0 (12.3)	49.9 (4.3)1
P value		0.16	0.00	0.00

¹P = 0.00 for the comparison between pre-operative and post-operative angles for each surgical approach.

²P = 0.55 for relationship between gender and surgical approach.