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

Table 4 Parameters evaluated in computed tomography angiography-angiography concordance group and in computed tomography angiography-angiography non-concordance group, n (%)

Parameter	Concordance group (n = 19)	Non-concordance group (n = 16)	P value, Chi-square test	P value, Mann-Whitney U test
Patients	19 (54.2)	16 (45.7)
Age (yr)	73.3 (± 18.0)	62.8 (± 17.3)		0.05
Male/female (ratio)	11/8	10/6	NS
Haemoglobin, median (interquartile range) (g/dL)	7.2 (6-8.2)	8 (7.5-8.3)		NS
Upper bleeding	9 (47.4)	6 (37.5)	NS
Lower bleeding	10 (52.6)	10 (62.5)	NS
Time interval between CTA and DSA, median (interquartile range) (h)	3 (2-5)	6.5 (2.7-20)		0.02
Bleeding arterial volume, median (interquartile range) (mL)	0.55 (0.25-0.80)	0.33 (0.18-0.66)		NS
Bleeding venous volume, median (interquartile range) (mL)	2.06 (1.67-4.66)	0.9 (0.27-2.15)		0.02
Bleed rate, median (interquartile range) (mL/min)	2.18 (1.30-5.01)	0.19 (0.02-2.21)		0.02

CTA: Computed tomography angiography; DSA: Digital subtraction angiography; NS: Not significant.