Development and validation of a new algorithm model for differential diagnosis between Crohn's disease and intestinal tuberculosis: a combination of laboratory, imaging and endoscopic characteristics

Table 5 Accuracy of using each single discriminating factor in differentiating ITB and CD

Factors	Sensitivity, %	Specificity, %	PPV, %	NPV, %
Positive IGRAs	86.36	82.82	82.61	85.71
≥ 4 segments involved	81.82	77.27	78.26	80.95
Longitudinal ulcer	40.91	100	100	62.86
Circular ulcer	100	50	66.67	100
Aphthous ulcer	54.55	90.91	85.71	66.67

ITB, intestinal tuberculosis; CD, Crohn's disease; PPV, positive predictive value; NPV, negative predictive value

ISSN: 1471-230X