Table 3. Degree of certainty.

	(a) Extent of disease			(b) Surface asperity			(c) Comprehensive recognition
	2 D	3 D	P	2 D	3 D	P	2 D	3 D	P
Overall	2.82 ± 1.09	3.20 ± 1.04	< 0.01	2.65 ± 1.00	3.43 ± 0.99	< 0.01	2.66 ± 1.03	3.12 ± 1.06	< 0.01
Expert	3.00 ± 0.92	3.34 ± 0.88	< 0.01	3.04 ± 0.83	3.66 ± 0.84	< 0.01	2.88 ± 0.98	3.36 ± 0.90	< 0.01
Trainee	2.91 ± 1.13	3.41 ± 1.18	< 0.01	2.46 ± 0.93	3.55 ± 1.09	< 0.01	2.69 ± 1.07	3.24 ± 1.22	< 0.01
Novice	2.55 ± 1.14	2.85 ± 0.95	< 0.01	2.45 ± 1.11	3.06 ± 0.91	< 0.01	2.43 ± 1.00	2.76 ± 0.93	< 0.01