Table 1. Patient characteristics (n=79).
| Characteristics | Patient number |
|---|---|
| Age, median [range] (years) | 68 [36–85] |
| Sex | |
| Male | 47 |
| Female | 32 |
| Site of primary tumour | |
| Colon | 36 |
| Rectum | 43 |
| Stage of primary tumour | |
| I–IIIB | 56 |
| IV | 23 |
| Number of lung metastasis | |
| Solitary | 50 |
| Multiple | 29 |
| Location of lung metastasis | |
| Unilateral | 58 |
| Bilateral | 21 |
| Preoperative serum CEA level (ng/mL) | |
| ≤5 | 51 |
| >5 | 28 |
| Disease free interval (months) | |
| ≤24 | 59 |
| >24 | 20 |
| History of liver metastases | |
| None | 43 |
| Present | 36 |
| Surgical procedure | |
| Wedge resection | 45 |
| Anatomical resection | 34 |
| Complete resection | |
| Achieved | 73 |
| Not achieved | 6 |
| Adjuvant chemotherapy | |
| Yes | 60 |
| No | 19 |
| CTC count | |
| 0 | 66 |
| 1 | 8 |
| 2 | 3 |
| 3 | 1 |
| 6 | 1 |
CEA, carcinoembryonic antigen; CTC, circulating tumour cell.