Table 5. Performance of individual criterion among experts and fellows.

Criterion	Sensitivity (%)	Specificity (%)	Accuracy (%)	PPV (%)	NPV (%)	Kappa
OFDI signal (darker in superficial)	75.8 (67.2, 83.2)	63.4 (58.4, 68.3)	66.4 (62.1, 70.5)	39.6 (35.7, 43.6)	89.3 (85.7, 92.0)	0.30 (0.22, 0.37)
Architecture of acini (irregular)	72.5 (63.6, 80.3)	81.6 (77.3, 85.4)	79.4 (75.6, 82.9)	55.4 (49.5, 61.2)	90.4 (87.5, 92.7)	0.49 (0.41, 0.57)

OFDI, optical frequency domain imaging; PPV, positive predictive value; NPV, negative predictive value.