Table 2.

Radiographic measurements of the dysplastic deformity of the matched hip dysplasia patients preoperatively and after PAO. The same radiographic measures were made for the normal hips to ensure that postoperative correction was similar to normal anatomy.

	LCEA (degrees)			Tönnis Angle (degrees)			Extrusion Index
Patient Pair	Dysplastic	Post PAO	Normal	Dysplastic	Post PAO	Normal	Dysplastic	Post PAO	Normal
1	12	30	26	22	0	5	0.35	0.17	0.23
2	17	23	25	13	7	7	0.35	0.20	0.24
3	8	36	29	23	8	4	0.41	0.07	0.17
4	21	31	31	8	2	1	0.30	0.16	0.14
5	7	23	25	24	14	10	0.33	0.16	0.22
6	3	23	34	23	3	0	0.40	0.17	0.11
7	18	36	35	17	−4	0	0.27	0.14	0.12
8	15	40	30	12	−5	2	0.29	0.08	0.20
9	7	29	35	20	7	1	0.42	0.19	0.04
10	7	33	36	23	2	0	0.40	0.11	0.05
Median	10	31	31	21	3	2	0.35	0.16	0.15
IQR	[7, 16.5]	[24.5, 35.3]	[26.8, 34.8]	[14, 23]	[0.5, 7]	[0.3, 4.8]	[0.31,0.40]	[0.12, 0.17]	[0.11, 0.22]