Table 3. Axial vertebral rotation.

		Reader 1	Reader 2	absolute difference
R T1	Mean ± SD	4.3 ± 4.01	4.0 ± 3.34	2.1 ± 3.48
R T2	Mean ± SD	4.4 ± 3.81	4.1 ± 3.49	2.6 ± 3.90
R T3	Mean ± SD	4.5 ± 3.67	4.2 ± 3.88	2.8 ± 3.39
R T4	Mean ± SD	4.3 ± 3.31	4.3 ± 4.05	2.8 ± 3.37
R T5	Mean ± SD	4.3 ± 3.01	3.8 ± 3.15	2.9 ± 2.97
R T6	Mean ± SD	3.5 ± 3.48	3.9 ± 3.31	3.2 ± 3.74
R T7	Mean ± SD	3.8 ± 3.18	4.2 ± 3.82	3.1 ± 3.41
R T8	Mean ± SD	4.3 ± 4.32	4.6 ± 3.91	2.9 ± 2.93
R T9	Mean ± SD	4.8 ± 4.31	4.7 ± 4.05	2.6 ± 2.94
R T10	Mean ± SD	5.0 ± 4.32	4.3 ± 3.55	2.3 ± 2.95
R T11	Mean ± SD	5.5 ± 4.50	4.9 ± 4.07	3.0 ± 3.10
R T12	Mean ± SD	5.7 ± 5.08	5.3 ± 4.72	2.9 ± 3.79
R L1	Mean ± SD	5.7 ± 4.89	5.6 ± 5.24	2.4 ± 3.00
R L2	Mean ± SD	5.0 ± 4.10	4.7 ± 4.01	2.1 ± 3.05
R L3	Mean ± SD	4.6 ± 3.95	4.3 ± 3.37	2.3 ± 3.13
R L4	Mean ± SD	3.9 ± 3.41	3.8 ± 2.76	1.9 ± 3.15
R L5	Mean ± SD	3.9 ± 3.05	3.8 ± 2.96	2.3 ± 2.48

The mean ± SD of the vertebral rotation (R) in the frontal view was calculated on every level (RT1- RL5) for each reader. In addition the absolute difference was determined.