Interobserver agreement for the Vesical Imaging-Reporting and Data System (VI-RADS) in differentiating non-muscle-invasive and muscle-invasive urinary bladder tumors

Egyptian Journal of Radiology and Nuclear Medicine

Table 3 Diagnostic performance of each reader for T2-WI, DWI, DCE, and overall VI-RADS score at cutoff value ≥ 3

Cutoff ≥ 3	Pathology		Test value	P value	Sig.
	Non-muscle invasive	Muscle invasive
	No. = 12	No. = 31
SC category
Reader 1
Negative (< 3)	8 (66.7%)	0 (0.0%)	25.390*	0.000 or < 0.001	HS
Positive (≥ 3)	4 (33.3%)	31 (100.0%)	25.390*	0.000 or < 0.001	HS
Reader 2
Negative	7 (58.3%)	1 (3.2%)	17.349*	0.000	HS
Positive	5 (41.7%)	30 (96.8%)	17.349*	0.000	HS
Reader 3
Negative	6 (50.0%)	0 (0.0%)	18.014*	0.000	HS
Positive	6 (50.0%)	31 (100.0%)	18.014*	0.000	HS
DWI category
Reader 1
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS
Reader 2
Negative	11 (91.7%)	2 (6.5%)	29.784*	0.000	HS
Positive	1 (8.3%)	29 (93.5%)	29.784*	0.000	HS
Reader 3
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS
CE category
Reader 1
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS
Reader 2
Negative	11 (91.7%)	2 (6.5%)	29.784*	0.000	HS
Positive	1 (8.3%)	29 (93.5%)	29.784*	0.000	HS
Reader 3
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS
Overall VI-RADS score
Reader 1
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS
Reader 2
Negative	11 (91.7%)	2 (6.5%)	29.784*	0.000	HS
Positive	1 (8.3%)	29 (93.5%)	29.784*	0.000	HS
Reader 3
Negative	10 (83.3%)	1 (3.2%)	29.162*	0.000	HS
Positive	2 (16.7%)	30 (96.8%)	29.162*	0.000	HS

P value > 0.05: Nonsignificant; P value < 0.05: Significant; P value < 0.01: Highly significant
*Chi-square test