TABLE 4.

Frequency of the Radiographic Markers Used Based on the Level of Evidence of the Article^a

	COS	PWS	ISS	Coxa Profunda	Acetabular Protrusio	HP	CEA	AI
Level 2	2	1	1	2	0	0	2	1
Level 3	7	4	2	3	3	0	7	2
Level 4	18	7	6	4	5	6	13	3
Total	27	12	9	9	7	6	22	6

^aAI, acetabular index; CEA, center-edge angle; COS, crossover sign; HP, herniation pit; ISS, ischial spine sign; PWS, posterior wall sign.