Thyroid Cytopathology Reporting by the Bethesda System: A Two-Year Prospective Study in an Academic Institution

Table 6

Comparison of results of the present study and random studies over the last 30 years.

Study	Number	Sensitivity %	Specificity %	PPV %	NPV %
Al-Sayer et al. [27]	70	86	93	80	96
Silverman et al. [28]	309	93	96.5	88.9	96.5
Cusick et al. [29]	283	76	58	72	64
Altavilla et al. [30]	257	71.4	100	100	94.4
Bouvet et al. [31]	78	93.5	75	85.3	88.2
Ko et al. [32]	207	78.4	98.2	99	66.3
Kessler et al. [33]	170	79	98.5	98.7	76.6
Handa et al. [34]	66	97	100	96	100
Gupta et al. [35]	75	80	86.6	80	86.6
Present study (FN/SFN excluded)	40	76.92	88.46	76.92	88.46
Present study (FN/SFN included as benign)	40	73.33	89.66	78.57	86.67
Present study (FN/SFN included as malignant)	40	78.57	81.25	64.71	89.66

PPV = positive predictive value and NPV = negative predictive value.