Table 2.

The sensitivity, specificity and accuracy of CT and DW-MRI in diagnosing ovarian cancer

Techniques		Pathological types		Accuracy	Sensitivity	Specificity	Kappa test
		Benign	Malignant				K	P
DW-MRI	Benign	25	4	89.77%	93.10%	83.33%	0.771	< 0.001
	Malignant	5	54
CT	Benign	23	9	81.82%	84.48%	76.67%	0.602	< 0.001
	Malignant	7	49

Notes: Accuracy = (true positive + true negative)/(true positive + false negative + false positive + true negative); Sensitivity = true positive/(true positive + false negative); Specificity = true negative/(true negative + false positive); positive predictive value = true positive/(true positive + false positive); negative predictive value = true negative/(true negative + false negative); K, Kappa coefficient; P < 0.05, significant difference of Kappa coefficient between CT and DW-MRI.