Table 3:

Localization of parotid lesions with imaging and surgical findings and the diagnostic performance of the surgically confirmed deep lobe lesions^{^a}

	Surgical Findings		Diagnostic Performance (Deep Lobe Lesions) (%) (95% CI)
	Deep Lobe	Superficial Lobe	Accuracy	Sensitivity	Specificity	PPV	NPV
1) Direct method
Deep lobe	14	0	97.8 (91.4–97.8)	87.5 (69.2–87.5)	100 (96.1–100)	100 (79.0–100)	97.4 (93.6–97.4)
Superficial lobe	2	75	97.8 (91.4–97.8)	87.5 (69.2–87.5)	100 (96.1–100)	100 (79.0–100)	97.4 (93.6–97.4)
2) FNL
Deep lobe	6	5	83.5 (76.7–89.7) (P = .065)	37.5 (18.0–55.0) (P = .008^{^b})	93.3 (89.2–97.1) (P = .063)	54.4 (26.2–80.1)	87.5 (83.6–91.0)
Superficial lobe	10	70	83.5 (76.7–89.7) (P = .065)	37.5 (18.0–55.0) (P = .008^{^b})	93.3 (89.2–97.1) (P = .063)	54.4 (26.2–80.1)	87.5 (83.6–91.0)
3) RMV
Deep lobe	8	0	91.2 (84.7–91.2) (P = .727)	50.0 (31.6–50.0) (P = .031^{^b})	100 (96.1–100) (NA)	100 (63.2–100)	90.4 (86.8–90.4)
Superficial lobe	8	75	91.2 (84.7–91.2) (P = .727)	50.0 (31.6–50.0) (P = .031^{^b})	100 (96.1–100) (NA)	100 (63.2–100)	90.4 (86.8–90.4)
4) UL
Deep lobe	8	8	82.4 (74.6–89.5) (P = .002^{^b})	50 (27.8–70.1) (P = .070)	89.3 (84.6–93.6) (P = .008^{^b})	50 (27.8–70.1)	89.3 (84.6–93.6)
Superficial lobe	8	67	82.4 (74.6–89.5) (P = .002^{^b})	50 (27.8–70.1) (P = .070)	89.3 (84.6–93.6) (P = .008^{^b})	50 (27.8–70.1)	89.3 (84.6–93.6)

Note:—PPV indicates positive predictive value; NPV, negative predictive value; NA, not available.
↵a Statistical analyses (P values) were performed comparing the direct method with each indirect method.
↵b Significant difference (P < .05).