Table 2 Differences (mean ± standard deviation) between upright (X), prone (CT), and supine (MRI) positions for Cobb angle, thoracic kyphosis, lumbar lordosis, and apical vertebral rotation in the thoracic as well as lumbar curves. According to the Bland-Altman plot, the P value showed if there is agreement by using the t test. If this test showed no significant different (P > 0.05), a regression analysis was performed to see is if there is agreement, written in brackets

 Cobb (°)

68.2 ± 15.4

53.9 ± 14.8

56.7 ± 13.5

<0.001

<0.001

<0.001

 Kyphosis (°)

25.8 ± 11.4

22.4 ± 11.6

17.3 ± 9.8

0.004

<0.001

<0.001

 Vertebral rotation (°)

21.6 ± 11.7

19.9 ± 8.9

16.3 ± 10.8

0.161 (0.007)

0.001

0.002

 Cobb (°)

44.3 ± 16.8

33.1 ± 15.0

35.2 ± 15.9

<0.001

<0.001

0.018

 Lordosis (°)

48.8 ± 12.0

45.4 ± 10.8

43.7 ± 12.4

0.006

<0.001

0.341 (0.620)^a

 Vertebral rotation (°)

10.7 ± 12.8

7.5 ± 11.4

6.2 ± 13.7

0.428 (<0.001)

0.663 (0.129)^a

0.679 (0.006)