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Table 1 Correlation between ultrasound and FNAB

From: Can concurrent core biopsy and fine needle aspiration biopsy improve the false negative rate of sonographically detectable breast lesions?

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