Table 2.

Inter- and intra-observer reproducibility

	Inter-observer reproducibility (observer A × B)		Intra-observer reproducibility (observer A)
	ICC	95 % CI	ICC	95 % CI
Height of L4 vertebral body	0.86	0.79–0.94	0.91	0.83–0.95
Height of L5 vertebral body	0.88	0.80–0.95	0.92	0.85–0.96
Height of L4/5 intervertebral disc	0.91	0.85–0.96	0.93	0.87–0.97
Height of L5/S1 intervertebral disc	0.92	0.86–0.96	0.92	0.89–0.95
Height of L4 spinous process	0.89	0.83–0.93	0.91	0.87–0.94
Height of L5 spinous process	0.91	0.85–0.95	0.92	0.87–0.95