Table 6 Multivariate analysis of risk factors for abnormal contact pressure after virtual periacetabular osteotomy

Lateral center-edge angle (°) ^a

11.7 (−4.8 to 16.5)

3.3 (− 14.8 to 17.4)

0.023

Medial center-edge angle (°) ^a

47.8 ± 8.6

53.7 ± 8.8

0.056

Acetabular arc (°) ^a

58.1 ± 8.7

59.0 ± 12.8

0.796

Tönnis angle (°) ^a

20.6 ± 5.2

24.6 ± 6.5

0.040

Sharp angle (°) ^a

47.6 ± 3.4

48.4 ± 3.9

0.510

Extrusion index (%) ^a

37.0 ± 6.1

45.1 ± 11.3

0.006

Crossover sign ^b

10 (30.3)

3 (27.3)

0.848

Posterior wall sign ^b

23 (69.7)

10 (90.9)

0.130

Anterior wall index ^a

29.0 ± 11.3

20.2 ± 11.8

0.033

Posterior wall index ^a

90.9 ± 17.0

76.1 ± 17.4

0.014

Roundness index ^a

51.8 ± 1.7

54.4 ± 2.3

< 0.001

Femoro-epiphyseal acetabular roof index ^a

4.2 (−1.5 to 16.5)

4.3 (−1.5 to 20.9)

0.795