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

Table 5

Kappa coefficients for intrarater agreement between 𝑡₂ and 𝑡₃, clustered by software and KPG single component.

Observer	𝐶𝑥				𝐶𝑦				𝐶𝑧
	Kodak		Planmeca		Kodak		Planmeca		Kodak		Planmeca
	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**
1	0.808	0.078	0.827	0.069	0.795	0.073	0.926	0.050	0.855	0.089	0.787	0.076
2	0.726	0.086	0.862	0.064	0.715	0.098	0.799	0.097	0.691	0.109	0.576	0.094
3	0.806	0.077	0.931	0.047	0.861	0.074	0.963	0.036	0.840	0.074	0.721	0.072
4	0.747	0.071	0.827	0.069	0.650	0.114	0.926	0.050	0.755	0.089	0.652	0.079
5	0.805	0.078	0.862	0.064	0.632	0.108	0.633	0.095	0.652	0.112	0.508	0.093
6	0.730	0.086	0.931	0.047	0.734	0.096	0.963	0.036	0.840	0.074	0.749	0.083
7	0.806	0.079	0.827	0.069	0.707	0.106	0.926	0.050	0.855	0.089	0.787	0.076
8	0.765	0.083	0.860	0.065	0.708	0.089	0.796	0.097	0.652	0.112	0.543	0.094
9	0.768	0.082	0.931	0.047	0.827	0.097	0.963	0.036	0.840	0.074	0.785	0.078
Observer	𝑅𝑥				𝑅𝑦				𝑅𝑧
	Kodak		Planmeca		Kodak		Planmeca		Kodak		Planmeca
	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**	𝑘^∗	SE**
1	0.833	0.078	0.884	0.079	0.847	0.047	0.901	0.057	0.795	0.083	0.784	0.077
2	0.665	0.101	0.677	0.089	0.792	0.064	0.821	0.072	0.706	0.095	0.615	0.087
3	0.792	0.085	0.894	0.058	0.833	0.079	0.880	0.080	0.957	0.042	0.829	0.048
4	0.790	0.085	0.887	0.088	0.794	0.069	0.828	0.083	0.835	0.076	0.720	0.073
5	0.587	0.106	0.677	0.089	0.697	0.077	0.786	0.065	0.764	0.101	0.615	0.087
6	0.748	0.092	0.894	0.058	0.825	0.059	0.880	0.080	0.915	0.058	0.829	0.048
7	0.833	0.078	0.887	0.078	0.798	0.095	0.871	0.065	0.795	0.083	0.685	0.078
8	0.708	0.097	0.777	0.089	0.802	0.094	0.912	0.088	0.706	0.095	0.615	0.087
9	0.751	0.091	0.758	0.066	0.850	0.081	0.911	0.088	0.915	0.058	0.829	0.048

∗Kappa coefficient.
**Standard error.