Table 3. Baseline characteristics of M1a NSCLC patients only due to ipsilateral malignant pleural effusion after propensity score matching.
| Characteristics | Primary tumor resection | None primary tumor resection | p Value |
|---|---|---|---|
| N=125 | N=125 | ||
| Age group | 0.800 | ||
| ≤65 y | 62 (49.6) | 59 (47.2) | |
| >65 y | 63 (50.4) | 66 (52.8) | |
| Gender | 0.373 | ||
| Male | 73 (58.4) | 60 (48.0) | |
| Female | 52 (41.6) | 65 (52.0) | |
| Married | 74 (59.2) | 63 (50.4) | 0.204 |
| Race/ethnicity | 0.939 | ||
| White | 98 (78.4 | 96 (76.8) | |
| Black | 18 (14.4) | 20 (16.0) | |
| Other | 9 (7.0) | 9 (9.2) | |
| Tumor Size | 0.908 | ||
| ≤3cm | 55 (44.0) | 57 (45.6) | |
| ≤5cm | 35 (28.0) | 32 (25.6) | |
| ≤7cm | 15 (12.0) | 18 (14.4) | |
| >7cm | 20 (16.0) | 18 (14.4) | |
| Location | 0.921 | ||
| Main bronchus | 9 (7.2) | 11 (8.8) | |
| Upper | 55 (44.0) | 50 (40.0) | |
| Middle | 9 (7.2) | 7 (5.6) | |
| Lower | 51 (40.8) | 56 (44.8) | |
| Overlap | 1 (0.8) | 1 (0.8) | |
| Lymph node status | 0.210 | ||
| N0 | 52 (41.6) | 53 (42.4) | |
| N1 | 14 (11.2) | 18 (14.4) | |
| N2 | 57 (45.6) | 48 (38.4) | |
| N3 | 1 (0.8) | 6 (4.8) | |
| NX | 1 (0.8) | 0 (0) | |
| Histology | 0.662 | ||
| Adenocarcinoma | 65 (52.0) | 68 (54.4) | |
| Squamous cell carcinoma | 33 (26.4) | 27 (21.6) | |
| Other | 27 (21.6) | 30 (24.0) | |
| Radiotherapy | 0.377 | ||
| No | 91 (72.8) | 98 (78.4) | |
| Yes | 34 (27.2) | 27 (21.6) | |
| Follow-up time, months | 20 (1-48) | 6 (1-31) | <0.001 |
Bold values corresponds to the comparisons with P < 0.001.