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Table 2 CTA studies categorised by true/false positive/negative and bleeding site

From: Conventional angiography findings in hemodynamically unstable patients with acute abdominal hemorrhage and a negative CT bleeding study

 Upper gastro-intestinal bleeding (n = 34)Lower gastro-intestinal bleeding (n = 26)Renal (n = 11)Liver (n = 17)Abdominal / pelvic wall (n = 17)Other extra-luminal sites (n = 50)p
False negative3 (9%)04 (36%)01 (6%)0< 0.001
True negative3 (9%)2 (8%)1 (9%)0000.09
False positive4 (12%)6 (23%)02 (12%)1 (6%)9 (18%)0.46
True positive24 (71%)18 (69%)6 (54%)15 (88%)15 (88%)41 (82%)0.18
Sensitivity89%100%60%100%94%100% 
Specificity43%25%100%NANANA 
Positive predictive value85%75%100%88%94%82% 
Negative predictive value51%100%20%NANANA 
  1. NA Not assessed
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