Table 3 Measures of diagnostic accuracy and inconclusive proportion among parotid tumours

Sensitivity

85.0 (62.1–96.8)

88.9 (51.8–99.7)

81.8 (48.2–97.7)

Specificity

98.9 (93.9–100)

100 (93.5–100)

97.1 (84.7–99.9)

Positive predictive value

94.4 (72.7–99.9)

100 (63.0–100)

90.0 (55.5–99.7)

Negative predictive value

96.7 (90.7–99.3)

98.2 (90.4–99.9)

94.3 (80.8–99.3)

Accuracy

96.3 (90.9–99.0)

98.4 (91.6–100)

93.3 (81.7–98.6)

Inconclusive^a

22.7 (18.6–27.1)

12.0 (7.9–17.2)

34.4 (27.6–41.6)

Secondary FNAC^a

14.6 (11.5–18.4)

7.2 (4.4–11.6)

22.8 (17.4–29.2)