Table 7.

Validation of the grading model proposed by Feldman et al. [27] and this work with DCCT/EDIC ground truth using Fisher exact test.

	DCCT/EDIC ground truth		Total no of samples in the dataset
	Non-DSPN	DSPN
Severity grading by Feldman et al. [27]
Absent	2610 (100%)	0 (0%)	2610
Mild	219 (21%)	815 (79%)	1034
Moderate	0 (0%)	1092 (100%)	1092
Severe	8 (0.67%)	1194 (99.33%)	1202
Total	2837	3101	5939
Severity grading by this work
Absent	2568 (98.4%)	42 (1.61%)	2610
Mild	52 (5.03%)	982 (94.97%)	1034
Moderate	0 (0%)	1092 (100%)	1092
Severe	0 (0%)	1202 (100%)	1202
Total	2837	3101	5939