Appendiceal Intraluminal Gas: A CT Marker for Gangrenous Appendicitis

Table 2

Statistical analysis of intraluminal gas in predicting gangrenous appendicitis.

Statistics	Value	95% confidence interval
Specificity	78.95%	66.1–88.6%
Sensitivity	38.89%	23.1–56.5%
Negative likelihood ratio	0.77	0.6–1.0
Positive likelihood ratio	1.85	1.0–3.5
Negative predictive value	86.32%	82.5–89.4%
Positive predictive value	27.45%	16.5–42.0%

Disease prevalence = 17% [5] (Emil 2012).