Table 4. Stratification of duration of disease with respect to MDCT findings and peroperative findings (n=147).

MDCT: multi-detector computed tomography; TP: true positive; FP: false positive; FN: false negative; TN: true negative; PPV: positive predictive value; NPV: negative predictive value

Variables	Positive result on operative findings	Negative result on operative findings	p-Value	Positive result on operative findings	Negative result on operative findings	p-Value
	Duration of disease ≤15 days			Duration of disease >15 days
Positive result on MDCT	117 (100%)	2 (50.0%)	<0.0001	5 (71.42%)	6 (31.58%)	0.0681
Negative result on MDCT	-	2 (50.0%)		2 (25.57%)	13 (68.42%)
Sensitivity	100.0%			71.43%
Specificity	50.0%			68.42%
PPV	98.32%			45.45%
NPV	100.0%			86.67%
Diagnostic accuracy	98.35%			69.23%