Table 1.
Association between micropapillary/solid component and clinicopathological characteristics of patients with stage IA lung adenocarcinoma
| Characteristics | Group | P | ||
|---|---|---|---|---|
|
| ||||
| MP- & SD- | MP+/SD+ | MPp/SDp | ||
| Age (%) | 0.064 | |||
| ≤60 | 168 (51.9) | 44 (61.1) | 9 (34.6) | |
| >60 | 156 (48.1) | 28 (38.0) | 17 (65.4) | |
| Sex | 0.205 | |||
| male | 128 (39.5) | 34 (47.2) | 14 (53.8) | |
| female | 196 (60.5) | 38 (52.8) | 12 (46.2) | |
| Tumor size | 0.012 | |||
| ≤2 cm | 276 (85.2) | 51 (70.8) | 20 (76.9) | |
| >2 cm | 48 (14.8) | 21 (29.2) | 6 (23.1) | |
| STAS | <0.001 | |||
| - | 312 (96.3) | 41 (56.9) | 19 (73.1) | |
| + | 12 (3.7) | 31 (43.1) | 7 (26.9) | |
| LVI | 0.160 | |||
| - | 321 (99.1) | 70 (97.2) | 25 (96.2) | |
| + | 3 (0.9) | 2 (2.8) | 1 (3.8) | |
| Predominant subtybe | <0.001 | |||
| lepidic | 21 (6.5) | 0 | 0 | |
| acinar | 129 (39.8) | 33 (45.8) | 0 | |
| papillary | 174 (53.7) | 39 (54.2) | 0 | |
| micropapillary | 0 | 0 | 15 (57.7) | |
| solid | 0 | 0 | 11 (42.3) | |
| Surgery | 0.167 | |||
| lobectomy | 295 (91.0) | 70 (97.2) | 25 (96.2) | |
| segmentectomy/wedge resection | 29 (9.0) | 2 (2.8) | 1 (4.0) | |
CI, confidence interval. HR, hazard ratio. MP- & SD- (both micropapillary and solid component were absent), MP+/SD+ (either micropapillary or solid component was present, but the single or combined percentage of the MP and SD was not greater than 50%), MPp/SDp (either micropapillary or solid or the combined percentage of these two components was great than 50%). STAS, spread through air space.