Extravasated contrast volumetric assessment on computed tomography angiography in gastrointestinal bleeding: A useful predictor of positive angiographic findings

Table 5 Inter-reader agreement of volumetric analyses of arterial and venous phases

Variable	Reader A	Reader B	Average difference (95%CI)	DS of average difference	95% upper agreement limit (95%CI)	95% lower agreement limit (95%CI)
Volume in the arterial phase	0.70 ± 0.83	0.75 ± 1.01	-0.05 (-0.23 to 0.13)	± 0.52	0.98 (0.73–1.36)	-1.98 (-1.46 to -0.83)
Volume in the venous phase	2.50 ± 2.70	3.05 ± 3.88	-0.56 (-1.54 to 0.42)	± 2.85	5.03 (3.67 to 7.09)	-6.15 (-8.20 to -0.79)

DS: Digital subtraction.