Table 5.

Intra- and interobserver reliability analysis and 95% confidence interval

	X-ray		CT scan		MRI scan
	Intra	Inter	Intra	Inter	Intra	Inter
Thoracic Cobb	0.993 (0.971–0.998)	0.972 (0.888–0.993)	0.997 (0.988–0.999)	0.995 (0.980–0.999)	0.995 (0.982–0.999)	0.974 (0.896–0.994)
Lumbar Cobb	0.999 (0.996–1.00)	0.995 (0.980–0.999)	0.999 (0.996–1.00)	0.995 (0.981–0.999)	0.997 (0.990–0.999)	0.986 (0.945–0.997)
Thoracic kyphosis	0.989 (0.954–0.997)	0.922 (0.610–0.984)	0.931 (0.722–0.983)	0.864 (0.454–0.966)	0.992 (0.967–0.998)	0.940 (0.759–0.985)
Lumbar lordosis	0.986 (0.944–0.997)	0.989 (0.956–0.997)	0.995 (0.980–0.999)	0.973 (0.890–0.993)	0.995 (0.981–0.999)	0.971 (0.884–0.993)
Thoracic rotation	0.979 (0.915–0.995)	0.977 (0.906–0.994)	a	a	0.939 (0.756–0.985)	0.744 (0.409–0.964)
Lumbar rotation	0.975 (0.899–0.994)	0.996 (0.985–0.999)	a	a	0.906 (0.620–0.977)	0.885 (0.539–0.972)

^aIntra- and interobserver reliability for the rotation on 3-D scans; this method was tested previously (ICC 0.92 and 0.89) [9]