Table 7.
Influence of fine needle aspiration (FNA) on choice of operation
| Histology | FNA | Two-stage operations | p-value* | Neck dissection | p-value* | Total parotidectomy | p-value* | |
|---|---|---|---|---|---|---|---|---|
| Benign | Malignant | FP | 1/4 (25%) | – | 2/4 (50%) | – | 0/3 (0%) | – |
| Benign | Benign | TN | 3/170 (2%) | 0.09 | 2/170 (1%) | <0.01 | 3/169 (2%) | 0.94 |
| Malignant | Malignant | TP | 3/14 (21%) | – | 7/14 (50%) | – | 8/14 (57%) | – |
| Malignant | Benign | FN | 3/13 (23%) | 1.00 | 2/13 (15%) | 0.07 | 3/12 (25%) | 0.10 |
FP = false positive; TN = true negative; TP = true positive; FN = false negative
*
Comparing proportion between positive and negative FNA result, Fisher’s exact test