Brief Article
Copyright ©2010 Baishideng Publishing Group Co.
World J Gastroenterol. Sep 14, 2010; 16(34): 4291-4296
Published online Sep 14, 2010. doi: 10.3748/wjg.v16.i34.4291
Table 3 Predictive value of heterogeneity and presence of air within necrotic collection on computed tomography scan in diagnosing the presence of pus
HeterogeneityPresence of airBoth
Sensitivity (%)93.847.347.4
Specificity (%)52.084.092.0
Positive predictive value (%)55.569.281.8
Negative predictive value (%)92.967.723.3
Positive likelihood ratio   1.9 2.95.9
Negative likelihood ratio   0.1 0.60.6