Identification of the Optimal Model for the Prediction of Diabetic Retinopathy in Chinese Rural Population: Handan Eye Study

Table 2

The kappa coefficient between two ophthalmologists.

Doctor Hu	Doctor Zhang		Kappa
	DR	Non-DR
DR	108	13	0.857
Non-DR	22	4609

Note: Doctor Hu is referring to Ailian Hu; Doctor Zhang is referring to Xu Zhang.