Table 3. The distribution of prognostic factors between HER2-positive and HER2-negative ctDNA samples.
| HER2-positive in ctDNA | HER2-negative in ctDNA | P-value | |
|---|---|---|---|
| Number of patients | 7 | 17 | |
| Age (years, median (range)) | 67 (60–76) | 64 (29–81) | 0.464 |
|
Sex | |||
| Male | 6 | 13 | 0.612 |
| Female | 1 | 4 | |
|
Tumour stage | |||
| III | 0 | 1 | 0.512 |
| IV | 7 | 16 | |
|
Histology | |||
| Intestinal type | 5 | 7 | 0.177 |
| Diffuse type | 2 | 10 | |
|
HER2 with IHC/FISH | |||
| Positive | 4 | 4 | 0.112 |
| Negative | 3 | 13 | |
Abbreviations: ctDNA=circulating tumour DNA; FISH=fluorescence in situ hybridisation; HER2=human epidermal growth factor receptor 2; IHC=immunohistochemistry.