Comparison of montage with conventional stereoscopic seven-field photographs for assessment of ETDRS diabetic retinopathy severity

Table 3 Diabetic retinopathy severity level: stereoscopic 7F photographs compared with montage image

Retinopathy severity	Sensitivity	Specificity	PPV	NPV	PLR	NLR	Rate of agreement
Level 35	0.33	0.95	0.50	0.91	6.60	0.71	0.88
Level 43	0.73	0.87	0.62	0.92	5.62	0.31	0.91
Level 47	0.77	0.97	0.91	0.92	25.67	0.24	0.91
Level 53	1.00	0.95	0.78	1.00	20.00	0.00	0.95
Level ≥ 60	1.00	1.00	1.00	1.00	–	0.00	1.00

PPV positive predictive value, NPV negative predictive value, PLR positive likelihood ratio, NLR negative likelihood ratio

ISSN: 2056-9920