Table 1. Baseline characteristics of M1a NSCLC patients only due to ipsilateral malignant pleural effusion.
| Characteristics | Primary tumor resection | None primary tumor resection | p Value |
|---|---|---|---|
| N=128 | N=2089 | ||
| Age group | <0.001 | ||
| ≤65 y | 65 (50.8) | 617 (29.5) | |
| >65 y | 63 (49.2) | 1472 (70.5) | |
| Gender | 0.375 | ||
| Male | 75 (58.6) | 1140 (54.6) | |
| Female | 53 (41.4) | 949 (45.4) | |
| Married | 75 (58.6) | 1022 (48.9) | 0.034 |
| Race/ethnicity | 0.569 | ||
| White | 100 (78.1) | 1624 (77.7) | |
| Black | 19 (14.8) | 268 (12.8) | |
| Other | 9 (7.0) | 197 (9.4) | |
| Tumor Size | <0.001 | ||
| ≤3cm | 56 (43.8) | 548 (26.2) | |
| ≤5cm | 35 (27.3) | 598 (28.6) | |
| ≤7cm | 17 (13.3) | 490 (23.5) | |
| >7cm | 20 (15.6) | 453 (21.7) | |
| Location | 0.292 | ||
| Main bronchus | 10 (7.8) | 150 (7.2) | |
| Upper | 55 (43.0) | 1104 (52.8) | |
| Middle | 9 (7.0) | 110 (5.3) | |
| Lower | 51 (39.8) | 687 (32.9) | |
| Overlap | 3 (2.3) | 38 (1.8) | |
| Lymph node status | <0.001 | ||
| N0 | 53 (41.4) | 641 (30.7) | |
| N1 | 15 (11.7) | 155 (7.4) | |
| N2 | 58 (45.3) | 978 (46.8) | |
| N3 | 1 (0.8) | 222 (10.6) | |
| NX | 1 (0.8) | 93 (4.5) | |
| Histology | 0.386 | ||
| Adenocarcinoma | 66 (51.6) | 1042 (49.9) | |
| Squamous cell carcinoma | 34 (26.6) | 482 (23.1) | |
| Other | 28 (21.9) | 565 (27.0) | |
| Radiotherapy | 0.795 | ||
| No | 94 (73.4) | 1512 (72.4) | |
| Yes | 34 (26.6) | 577 (27.6) | |
| Follow-up time, months | 20 (1-48) | 7 (1-60) | <0.001 |
Bold values corresponds to the comparisons with P < 0.001.