Effect of Amalgam Restorations and Operation Parameters on Diagnostic Accuracy of Caries Detection Using Cone Beam Computed Tomography: An In Vitro Study

Table 1

Interrater reliability scores, using Cohen’s kappa.

Readers compared	Without amalgam restorations		With amalgam restorations
	Observed agreement	(95% CI)	Observed agreement	(95% CI)
1 and 2	0.953	0.902 (0.848-0.956)^a	0.910	0.773 (0.670-0.876)^a,b
1 and 3	0.899	0.791 (0.718-0.865)	0.776	0.467 (0.328-0.605)^b
2 and 3	0.888	0.768 (0.689-0.848)	0.825	0.600 (0.474-0.726)^b

^aThe Kappa score for readers 1 and 2 is higher than the other two Kappa scores. ^bThe Kappa score with amalgam restorations is statistically less than the Kappa score for the same readers without amalgam restorations.