Comparison of MRI and CT in the Evaluation of Unilateral Maxillary Sinus Opacification

Table 4

Diagnostic performance of CT and MRI for Observer1, Observer2, consensus, and flexible nasal endoscopy.

	Observer1		Observer2
	CT	MRI	CT	MRI
Sensitivity	90 (68–99)	95 (75–100)	100 (83–100)	100 (83–100)
Specificity	31 (15–51)	79 (60–92)	24 (10–44)	83 (64–94)
PPV	47 (40–54)	76 (61–87)	48 (43–53)	80 (64–90)
NPV	82 (52–95)	96 (77–99)	100	100
Accuracy	55 (40–69)	86 (73–94)	55 (40–69)	90 (78–97)
	Consensus		Flexible nasal endoscopy
	CT	MRI
Sensitivity	100 (83–100)	100 (83–100)	85 (62–97)
Specificity	14 (4–32)	79 (60–92)	14 (4–32)
PPV	44 (41–48)	77 (62–87)	41 (35–46)
NPV	100	100	57 (25–84)
Accuracy	49 (34–64)	88 (75–95)	43 (29–58)

Sensitivity, specificity, positive (PPV) and negative predictive values (NPV), and accuracy for potentially neoplastic diagnoses are expressed in percentages (95% confidence interval).