Table 3.

Mean Az values of observers and readings showing comparison of general performance

	ROC			Asymptotic normal
	Obs	Area	Std. err.	[95% conf. interval]
CBCT	32	0.8983	0.0651	0.78077	0.998
Digora	32	0.8883	0.0651	0.78077	0.989
Thz video	32	0.7811	0.0844	0.60754	0.976
Thz static	32	0.8533	0.0755	0.66370	0.988

CBCT, cone beam CT; ROC, receiver operating characteristic;

Ho: area (CBCT) =area (digora) = area(Thz video) = area (Thz static) chi2(2) = 2.63Prob>chi2 = 0.2682