Baseline characteristics
| No. | % | ||
|---|---|---|---|
| Healthy volunteers | (n = 15) | ||
| Age | median, range | 63 | 27-77 |
| Sex | Male | 7 | 46.7 |
| Female | 8 | 53.3 | |
| Non-cancerous patients | (n = 11) | ||
| Age | median, range | 53 | 35-79 |
| Sex | Male | 7 | 63.6 |
| Female | 4 | 36.4 | |
| Gastric cancer patients | (n = 55) | ||
| Age | median, range | 58 | 25-75 |
| Sex | Male | 36 | 65.5 |
| Female | 19 | 34.5 | |
| Disease presentation | Recurrent | 14 | 25.5 |
| Metastatic | 41 | 74.5 | |
| Type of surgery | Total gastrectomy | 9 | 16.4 |
| Subtotal gastrectomy | 10 | 18.2 | |
| No | 36 | 65.5 | |
| Differentiation | WD | 3 | 5.5 |
| MD | 9 | 16.4 | |
| PD | 27 | 49.1 | |
| SRC | 12 | 21.8 | |
| Othersa | 4 | 7.3 | |
| Lauren | Intestinal | 7 | 12.7 |
| Diffuse | 10 | 18.2 | |
| Mixed | 1 | 1.8 | |
| Unknown | 37 | 67.3 | |
| HER2 | Negative | 46 | 83.6 |
| Positive | 8 | 14.5 | |
| Unknown | 1 | 1.8 | |
| Type of body fluid | Ascites | 46 | 83.6 |
| Pleural fluid | 9 | 16.4 | |
| Previous palliative chemotherapy at acquisition of body fluid | Chemotherapy-naïve | 11 | 20.0 |
| 1 | 14 | 25.5 | |
| 2 | 15 | 27.3 | |
| ≥3 | 15 | 27.3 |
WD Well differentiated, MD Moderate differentiated, PD Poorly differentiated, SRC Signet ring cell carcinoma, No Number
Othersa: mucinous adenocarcinoma, undifferentiated carcinoma