Table 3.

Grading comparison between AI system and field grader, excluding ungradable participants (n=52)

Field grader
AI system			Not referable		Referable		Total
	Not referable		293		40		333
	Referable		27		175		202
	Total		320		315		535
	Sensitivity (95% CI)	Specificity (95% CI)		PPV (95% CI)		NPV (95% CI)		AUC
Referable or not	80.4% (75.5% to 86.3%)	91.5% (87.9% to 94.3%)		86.6% (81.7% to 90.3%)		87.9% (84.6% to 90.6%)		0.96

AI, artificial intelligence; AUC, area under the curve; NPV, Negative Predictive Value; PPV, Positive Predictive Value.