Table 2. Interobserver kappa coefficients by caries detection method.

	Observers 1 and 2	Observers 1 and 3	Observers 2 and 3
	Weighted kappa (SD)	Weighted kappa (SD)	Weighted kappa (SD)
Visual inspection	0.631 (0.062)	0.657 (0.064)	0.665 (0.057)
Intraoral film	0.699 (0.049)	0.750 (0.044)	0.759 (0.042)
Intraoral CCD sensor	0.746 (0.045)	0.769 (0.048)	0.777 (0.041)
Intraoral PSP sensor	0.774 (0.039)	0.790 (0.040)	0.811 (0.036)
Cone beam CT	0.695 (0.051)	0.802 (0.047)	0.802 (0.039)

CCD, charge-coupled device; PSP, photostimulable phosphor; SD, standard deviation