Table 2.

Diagnostic accuracy of computed tomography angiography in patients with various severities of gastrointestinal hemorrhage

	Prevalence	Sensitivity	Specificity	PPV	NPV	AUC
All patients (n = 262)	74.4 (68.7–79.6)	73.8 (67.1–79.6)	94.0 (85.4–98.3)	97.3 (93.2–99.3)	55.3 (45.7–64.6)	0.839 (0.797–0.881)
Mild (n = 75)	66.7 (54.8–77.1)	64.0 (49.2–77.1)	92.0 (74.0–99.0)	94.1 (80.3–99.3)	56.1 (39.7–71.5)	0.780 (0.694–0.866)
Moderate (n = 139)	73.4 (65.2–80.5)	73.5 (63.9–81.8)	94.6 (81.8–99.3)	97.4 (90.9–99.7)	56.5 (43.3–69.0)	0.841 (0.784–0.897)
Severe (n = 48)	89.6 (77.3–96.5)	86.0 (72.1–94.7)	100 (47.8–100)	100 (90.5–100)	45.5 (16.7–76.6)	0.930 (0.878–0.983)

Data are described as percentages with 95% confidence intervals except AUC.

PPV, positive predictive value; NPV, negative predictive value; AUC, area under the receiver operating characteristics curve.