Table 1.

Alpha angles and height of asphericity for each group with equivalent times in clockwise rotation

Group	Alpha angle (degrees)		Maximum height of asphericity (mm)
	Highest	Lowest
Group I— no radiographic signs of FAI	56.2 (10 o’clock)	40.1 (4 o’clock)	2.8 (11 o’clock)
Group II—radiographic signs of FAI only on lateral crosstable view	61.4 (11 o’clock)	42.2 (4 o’clock)	3.3 (10 o’clock)
Group III—radiographic signs of FAI only on anteroposterior pelvis view	73.1 (7 o’clock)	45.9 (3 o’clock)	2.8 (10 o’clock)
Group IV—radiographic signs of FAI on anteroposterior pelvis view and on lateral crosstable view	66.2 (12 o’clock)	39.6 (8 o’clock)	4.5 (12 o’clock)