The 2×2 table for US-guided FNA SCLN results compared with lung cancer diagnosis made by all further investigations (Reference Tests), and with diagnosis made by the top 3 standard diagnostic reference tests (core LN biopsy, bronchial washings and lung biopsy)
| Lung cancer diagnosis by all further investigations (n=57) | Total | ||||
|---|---|---|---|---|---|
| Present | n= | Absent | n= | ||
| FNA results | |||||
| Positive | True positive | 40 | False positive | 0 | 40 |
| Negative | False negative | 12 | True negative | 5 | 17 |
| Total | 52 | 5 | 57 | ||
| Core LN biopsy (n=23) | Bronchial washings (n=16) | Lung biopsy (n=8) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Present | Absent | Total | Present | Absent | Total | Present | Absent | Total | |
| FNA results | |||||||||
| Positive | 18 | 0 | 18 | 9 | 0 | 9 | 4 | 0 | 4 |
| Negative | 4 | 1 | 5 | 4 | 3 | 7 | 3 | 1 | 4 |
| Total | 22 | 1 | 23 | 13 | 3 | 16 | 7 | 1 | 8 |
FNA, fine-needle aspiration; LN, lymph node; SCLN, supraclavicular and cervical lymphadenopathy; US, ultrasound.