The Ischial Spine in Developmental Hip Dysplasia: Unraveling the Role of Acetabular Retroversion in Periacetabular Osteotomy
Table 1
Comparison of the 3 acetabular version groups where analysis of variance was performed.
Acetabular version
Ischial spine index (%)
PRIS 1 (mm)
PRIS 2 (mm)
Age (years)
CE angle (degrees)
CA angle (degrees)
Tönnis angle
Anteverted (n = 72)
5.64 ± 13.08 (0–63)
0.46 ± 1.17 (0–6.4)
6.29 ± 2.55 (2.40–18.1)
31.32 ± 10.87 (15–56)
5.31 ± 10.39 (-26–30)
-0.33 ± 14.44 (-44–28)
25.36 ± 6.70 (7–45)
Neutral (n = 34)
20.30 ± 24.68 (0–80)
1.73 ± 2.19 (0–7)
7.16 ± 2.33 (3–11.8)
33.06 ± 9.76 (15–48)
8.22 ± 9.30 (−17–24)
1.03 ± 14.96 (−30–32)
22.16 ± 5.82 (9–35)
Retroverted (n = 78)
34.16 ± 25.48 (0–80)
3.32 ± 3.09 (0–13.80)
8.47 ± 3.26 (3–17.8)
28.12 ± 10.04 (15–48)
4.28 ± 12.54 (−50–26)
−0.11 ± 19.52 (−46–47)
24.11 ± 8.04 (0–44)
Total (n = 184)
21.33 ± 24.83 (0–80)
1.90 ± 2.66 (0–13.8)
7.38 ± 2.99 (2.4–18.1)
30.29 ± 10.45 (15–56)
5.42 ± 11.21 (−50–30)
0.02 ± 16.76 (−46–57)
24.23 ± 7.21 (0–45)
F
33.665
27.94
11.1
3.44
1.55
0.07
2.43
Mean square
15299.248
153.843
90.380
367.355
194.053
20.993
124.857
<0.001
<0.001
<0.001
0.03
0.21
0.92
0.09
All values are described as mean ± SD (range). CE angle = Wiberg lateral coverage angle; Tönnis angle = acetabular bearing surface index; CA angle = Lequesne anterior coverage angle.
