The Ischial Spine in Developmental Hip Dysplasia: Unraveling the Role of Acetabular Retroversion in Periacetabular Osteotomy

Table 4

Retroversion index according to radiographic markers (PWS, COS, and ISS).

	Retroversion index
	PRISS (+) (%)	PRISS (−) (%)
(+) COS, (+) PWS	33.6%	29.9
(+) COS, (−) PWS	25.6%	23.8