Table 1.

Groups and Weights for Analysis of Cohen's kappa

κ Analysis		Measurement Parameters*
Group	Weight	B-Scan Count (n)	A-Scan Count (n)	Maximum Height (μm)
1	1.00	0–2	0–8	0–7
2	0.70	3–6	9–24	8–15
3	0.00	>6	>24	>15

For analysis of Cohen's kappa, the difference between the two graders was weighted according to its absolute value. Measurement errors of more than 3 B-scans, more than 9 A-scans, or more than 8 μm in maximum height were considered negligible.

^*Measurement parameters are given as the difference between the two graders.