Reliability of a Novel CBCT-Based 3D Classification System for Maxillary Canine Impactions in Orthodontics: The KPG Index

Table 4

Kappa coefficients for intrarater agreement between 𝑡₂ and 𝑡₃, clustered by scanner type.

Observer	NewTom 3G		Kodak 9500
	Kappa coefficient	Standard error	Kappa coefficient	Standard error
1	0.854	0.080	0.816	0.084
2	0.726	0.080	0.763	0.036
3	1	0.000	0.926	0.050
4	0.764	0.064	0.709	0.088
5	0.730	0.080	0.746	0.082
6	0.833	0.046	0.816	0.074
7	0.765	0.063	0.745	0.084
8	0.729	0.079	0.718	0.073
9	0.632	0.046	0.654	0.068