Table 4. Kappa statistics between lumbar curvature methods.

	Cobb1L1 - S1	Cobb2L1 - L5	Cobb3L2 - S1	Cobb4T12 - S1	Centroid	Posterior L1-L5	Posterior L1-S1	Trall
Cobb1		0.634	0.351	0.491	0.322	0.052	0.366	0.215
		Strong	Acceptable	Moderate	Acceptable	Slight	Acceptable	Acceptable
Cobb2			0.401	0.545	0.503	0.113	0.344	0.315
			Acceptable	Moderate	Acceptable	Slight	Acceptable	Acceptable
Cobb3				0.345	0.231	0.198	0.427	0.247
				Acceptable	Acceptable	Slight	Moderate	Acceptable
Cobb4					0.260	0.159	0.395	0.240
					Acceptable	Slight	Acceptable	Acceptable
Centroid						0.001	0.140	0.241
						Slight	Slight	Acceptable
Posterior L1-L5							0.241	0.452
							Acceptable	Moderate
Posterior L1-S1								0.033
								Slight