Table 2. Clinicopathological characteristics of part-solid nodules before propensity-score matching.
| Characteristic | GGO-predominant PSN (n=194, CTR ≤0.5) | Solid-predominant PSN (n=178, CTR >0.5) | P value |
|---|---|---|---|
| Sex | 0.663 | ||
| Female | 137 (70.6%) | 122 (68.5%) | |
| Male | 57 (29.4%) | 56 (31.5%) | |
| Age, year | 58.0±11.0 | 61.5±9.7 | 0.001 |
| Smoking history | 0.091 | ||
| Smoker | 23 (11.9%) | 12 (6.7%) | |
| Non-smoker | 171 (88.1%) | 166 (93.3%) | |
| ASA score | 0.063 | ||
| 1 | 99 (51.0%) | 74 (41.6%) | |
| 2 | 89 (45.9%) | 91 (51.1%) | |
| 3 | 6 (3.1%) | 13 (7.3%) | |
| BMI, kg/m2 | 22.5±2.9 | 22.7±3.1 | 0.484 |
| FEV1% predicted | 0.287 | ||
| ≥0.8 | 163 (84.0%) | 142 (79.8%) | |
| <0.8 | 31 (16.0%) | 36 (20.2%) | |
| Solid component size, mm | 6.1±2.9 | 13.0±5.2 | <0.001 |
| Total lesion size, mm | 16.7±6.2 | 19.0±6.4 | 0.001 |
| Surgery | 0.039 | ||
| Wedge resection | 33 (17.0%) | 32 (18.0%) | |
| Segmentectomy | 42 (21.6%) | 21 (11.8%) | |
| Lobectomy | 119 (61.3%) | 125 (70.2%) | |
| Lymph node resection | 0.186 | ||
| SNS | 95 (49.0%) | 75 (42.1%) | |
| SND | 99 (51.0%) | 103 (57.9%) | |
| Histological subtype | <0.001 | ||
| NIA | 79 (40.7%) | 22 (12.4%) | |
| IA | 115 (59.3%) | 156 (87.6%) | |
| LVI | 1 (0.5%) | 8 (4.5%) | 0.031 |
| VPI | 3 (1.5%) | 16 (9.0%) | 0.001 |
| Pathological N1/N2 | 1 (0.5%) | 19 (10.7%) | <0.001 |
PSN, part-solid nodule; PSM, propensity-score matching; GGO, ground glass opacity; CTR, consolidation-to-tumor ratio; ASA, American Society of Anesthesiologists; BMI, body mass index; FEV1, forced expiratory volume in 1 second; SNS, systematic lymph node sampling; SND, systematic lymph node dissection; NIA, noninvasive adenocarcinoma; IA, invasive adenocarcinoma; LVI, lymphovascular invasion; VPI, visceral pleural invasion.