Table 3a. Clinician grade × combined grade cross-tabulation (κ=0.695).

	Combined grade				Total
	No DR	Mild NPDR	Mod–severe NPDR	Prolif DR
Clinician grade
No DR	167	88	11	2	268
Mild NPDR	29	837	183	3	1052
Mod–severe NPDR	0	30	451	17	498
Prolif DR	1	4	12	129	146
Total	197	959	657	151	1964