Table 4 Within-group differences among pre-op, initial post-op and post-op at the last follow-up measures after adjusting for age at surgery and sex

NSA (°)

–

–

10.67

< 0.001

–

–

− 0.558

0.024

–

–

−11.233

< 0.001

LCEA (°)

− 42.0

< 0.001

−62.4

< 0.001

−1.5

0.13

− 3.0

0.051

40.5

< 0.001

59.4

< 0.001

MP (%)

43.1

< 0.001

64.0

< 0.001

1.8

0.002

2.1

0.001

−41.4

< 0.001

− 61.9

< 0.001

Tonnis Angle (°)

19.9

< 0.001

25.9

< 0.001

0.9

0.023

1.5

< 0.001

−19

< 0.001

−24.5

< 0.001

FNA(°)

–

–

–

–

–

–

–

–

–

–

−22.7

< 0.001

VAS

–

–

–

–

–

–

–

–

−4.8

< 0.001

−5.1

< 0.001