Table 1.

Correlation between ultrasound and FNAB

		FNAB		Total
		M	B, I, S
Ultrasound	M	180	29	209
	B, I, S	485	1359	1844
Total		665	1388	2053
Pearson chi-squared	p-value	Kappa coefficient		p-value
306.775	< 0.0001	0.304		< 0.0001
Sensitivity	0.2707	Positive predictive value		0.8612
Specificity	0.9791	Negative predictive value		0.7370

B: benign, I: indeterminate, S: suspicious, M: malignant