Table 2.

Inter-observer performance for plaster models (Plas-M), 2D digital photographs of plaster models (2D-M), and 3D digital models (3D-M) expressed as intra-class correlation coefficient (ICC) with 95 % confidence intervals

		Plas-M	2D-M	3D-M
DAR	ICC	0.849	0.846	0.866
	[95 % CI]	[0.784…0.904]	[0.779…0.901]	[0.806…0.915]
PM	ICC	0.258	0.258	0.260
	[95% CI]	[0.145…0.405]	[0.145…0.405]	[0.147…0.407]

DAR dental arch relationship, PM palatal morphology, Plas-M plaster models, 2D-M 2D digital photographs of plaster models, 3D-M 3D digital models, ICC intra-class correlation coefficient, CI confidence interval