Table 1. Patient characteristics.
| Characteristics | Values (n=30) |
|---|---|
| Age [mean, median (range)] (years) | 67.0, 68.0 (53.0–84.0) |
| Sex, n (%) | |
| Male | 18 (60.0%) |
| Female | 12 (40.0%) |
| Side of primary tumor, n (%) | |
| Right upper lobe | 16 (53.3%) |
| Right middle lobe | 2 (6.7%) |
| Right lower lobe | 5 (16.7%) |
| Left upper lobe | 6 (20.0%) |
| Left lower lobe | 1 (3.3%) |
| Tumor size [mean, median (range)] (cm) | 3.0, 3.3 (1.5–6.0) |
| Radiological tumor findings, n (%) | |
| Pure GGN | 1 (3.3%) |
| Part-solid GGN | 8 (26.7%) |
| Pure solid | 21 (70.0%) |
| Tumor histology, n (%) | |
| Adenocarcinoma | 22 (73.3%) |
| Squamous cell carcinoma | 6 (20.0%) |
| Others | 2 (6.7%) |
| c-T factor | |
| cT1 | 11 (36.7%) |
| cT2–3 | 19 (63.3%) |
| c-N factor | |
| cN0 | 25 (83.3%) |
| cN1–2 | 5 (16.7%) |
| c-stage | |
| c-stage I | 23 (76.7%) |
| c-stage II–III | 7 (23.3%) |
| p-T factor | |
| pT1 | 6 (20.0%) |
| pT2–4 | 24 (80.0%) |
| p-N factor | |
| pN0 | 22 (73.3%) |
| pN1–2 | 8 (26.7%) |
| p-stage | |
| p-stage I | 17 (56.7%) |
| p-stage II–III | 13 (43.3%) |
| Pleural invasion (pl) | |
| Negative | 13 (43.3%) |
| Positive | 17 (56.7%) |
| Lymphatic invasion (ly) | |
| Negative | 10 (33.3%) |
| Positive | 20 (66.7%) |
| Vessel invasion (v) | |
| Negative | 8 (26.7%) |
| Positive | 22 (73.3%) |
| Sequence of vessel ligation | |
| PA→PV | 22 (73.3%) |
| PV→PA | 8 (26.7%) |
| Duration of operation time {mean, median [range]} (min) | 136, 123 [69–235] |
| Amount of blood loss {mean, median [range]} (mL) | 76, 50 [0–290] |
| ÄpvCTC | |
| >1,000 | 1 (3.3%) |
| 101–1,000 | 8 (26.7%) |
| 11–100 | 9 (30.0%) |
| 1–10 | 6 (20.0%) |
| 0 | 2 (6.7%) |
| <0 | 4 (13.3%) |
GGN, ground glass nodule; c, clinical; p, pathological; PA, pulmonary artery; PV, pulmonary vein; ÄpvCTC, the changes in the CTC count in pulmonary venous blood during surgery.