Table 2.

Inter-examiner reliability values for direct tooth-coloured anterior restorations across 10 examiners and in relation to the selected FDI criteria

Anterior restorations		Inter-examiner reliability				Reliability in relation to reference standard
		Nominal data set (scores 1–5 incl. “not applicable”)		Ordinal data set (scores 1–5 only)		Ordinal data set (scores 1–5 only)
Criteria	Evaluation round	% Agreement	Fleiss Kappa	% Agreement	Weighted Kappa	% Agreement	Weighted Kappa
F1	1	53.5	0.34	51.5	0.54	60.5	0.52
	2	62.1	0.41	60.5	0.58	65.2	0.59
	3	61.9	0.42	60.3	0.57	64.8	0.61
F2	1	36.0	0.18	33.8	0.25	44.8	0.39
	2	37.8	0.20	35.6	0.34	45.2	0.46
	3	43.2	0.27	42.0	0.44	51.0	0.55
F4	1	46.7	0.33	36.0	0.34	48.5	0.45
	2	54.8	0.42	45.8	0.40	62.0	0.55
	3	54.9	0.40	45.9	0.33	60.5	0.55
B1	1	62.0	0.36	60.2	0.43	71.4	0.58
	2	65.3	0.42	65.8	0.51	72.6	0.63
	3	65.7	0.40	60.4	0.51	71.8	0.66
B2	1	59.9	0.32	57.5	0.19	68.6	0.34
	2	60.6	0.32	59.0	0.26	72.9	0.43
	3	69.0	0.38	69.1	0.25	77.5	0.47
A1	1	44.3	0.24	39.2	0.26	45.0	0.32
	2	50.6	0.32	46.3	0.38	49.0	0.37
	3	54.4	0.35	50.8	0.35	65.5	0.54
A2	1	53.5	0.39	49.3	0.55	56.8	0.61
	2	52.8	0.37	49.5	0.53	61.0	0.64
	3	55.9	0.41	53.6	0.56	68.5	0.71
A3	1	45.6	0.24	40.7	0.24	54.5	0.34
	2	46.9	0.28	42.4	0.30	56.2	0.40
	3	56.0	0.36	52.0	0.34	66.5	0.50

Criteria: F1: fracture of material and Retention, F2: marginal adaptation, F4: form and contour, B1: caries at restoration margin (CAR), B2: dental hard tissue defects, A1: surface lustre and texture, A2: marginal staining, A3: colour match