Table 2.

Sensitivity, specificity, positive predictive values (PPV+), negative predictive values (PPV−) and accuracy calculated for each of the proximal surfaces, for dentin lesions

Surface	Sensitivity		Specificity		PPV+		PPV−		Accuracy
	First observer	Second observer	First observer	Second observer	First observer	Second observer	First observer	Second observer	First observer	Second observer
A	0.47	0.56	0.58	0.33	0.84	0.80	0.80	0.85	0.49	0.52
B	0.56	0.74	0.61	0.38	0.85	0.83	0.74	0.73	0.57	0.67