Table 2. Clinical characteristics of all patients.
| Variables | Lobectomy (N=833), n (%) | Segmentectomy (N=55), n (%) | P value |
|---|---|---|---|
| Sex | 0.71 | ||
| Female | 454 (54.5) | 28 (50.9) | |
| Male | 379 (45.5) | 27 (49.1) | |
| Age | 0.20 | ||
| >65 years | 284 (34.1) | 24 (43.6) | |
| ≤65 years | 549 (65.9) | 31 (56.4) | |
| Smoking history | 0.90 | ||
| Never | 560 (67.2) | 36 (65.5) | |
| Smoke | 273 (32.8) | 19 (34.5) | |
| C/T ratio | 0.001 | ||
| >0.5 to <1 | 351 (42.1) | 36 (65.5) | |
| 1 | 482 (57.9) | 19 (34.5) | |
| Pathological T stage | 0.08 | ||
| is | 1 (0.12) | 0 (0.00) | |
| 1a | 76 (9.12) | 1 (1.82) | |
| 1b | 268 (32.2) | 25 (45.5) | |
| 1c | 245 (29.4) | 19 (34.5) | |
| 2a | 241 (28.9) | 10 (18.2) | |
| 3 | 2 (0.24) | 0 (0.00) | |
| Pathological N stage | 0.009 | ||
| 0 | 745 (89.4) | 46 (83.6) | |
| 1 | 29 (3.48) | 7 (12.7) | |
| 2 | 59 (7.08) | 2 (3.64) | |
| Pleural invasion | >0.99 | ||
| No | 699 (83.9) | 46 (83.6) | |
| Yes | 134 (16.1) | 9 (16.4) | |
| Lymphatic invasion | 0.76 | ||
| No | 659 (79.1) | 45 (81.8) | |
| Yes | 174 (20.9) | 10 (18.2) | |
| Pathological stage | 0.007 | ||
| IA1 | 19 (2.28) | 1 (1.82) | |
| IA2 | 236 (28.3) | 23 (41.8) | |
| IA3 | 287 (34.5) | 15 (27.3) | |
| IB | 201 (24.1) | 7 (12.7) | |
| IIB | 31 (3.72) | 7 (12.7) | |
| IIIA | 59 (7.08) | 2 (3.64) | |
| Pathological type | 0.08 | ||
| Adenocarcinoma | 756 (90.8) | 54 (98.2) | |
| Squamous cell carcinoma | 59 (7.08) | 0 (0.00) | |
| Others | 18 (2.16) | 1 (1.82) |
C/T, consolidation/tumor; N, node; T, tumor.