Table 3 Baseline characteristics of T1c NSCLC patients who were diagnosed in 2003–2013
Variables | Period between 2003 and 2008 | Period between 2009 and 2013 | ||||
|---|---|---|---|---|---|---|
Lobectomy (n = 563) | Lobectomy with MLND (n = 1158) | p | Lobectomy (n = 363) | Lobectomy with MLND (n = 1499) | p | |
Mean ± SD Age (years) | 67.60 ± 9.76 | 68.31 ± 9.32 | 0.14 | 67.94 ± 9.55 | 68.13 ± 9.06 | 0.71 |
Sex, no. (%) | 0.14 | 0.82 | ||||
male | 295 (52.4) | 563 (48.6) | 169 (46.6) | 708 (47.2) | ||
female | 268 (47.6) | 595 (51.4) | 194 (53.4) | 791 (52.8) | ||
Race, no. (%) | 0.93 | 0.49 | ||||
White | 489 (86.9) | 1004 (86.7) | 297 (81.8) | 1249 (83.3) | ||
Black/ Others | 74 (13.1) | 154 (13.3) | 66 (18.2) | 250 (16.7) | ||
Histology, no. (%) | 0.82 | 0.62 | ||||
Squamous cell carcinoma Adenocarcinoma | 199 (35.3) | 416 (35.9) | 127 (35.0) | 504 (33.6) | ||
364 (64.7) | 742 (64.1) | 236 (65.0) | 995 (66.4) | |||
Grade, no. (%) | 0.44 | 0.86 | ||||
I | 54 (9.6) | 131 (11.3) | 52 (14.3) | 239 (15.9) | ||
II | 274 (48.7) | 554 (47.8) | 186 (51.2) | 749 (50.0) | ||
III | 216 (38.4) | 434 (37.5) | 117 (32.2) | 467 (31.2) | ||
IV | 2 (0.4) | 11 (0.9) | 1 (0.3) | 6 (0.4) | ||
Unknown | 17 (3.0) | 28 (2.4) | 7 (1.9) | 38 (2.5) | ||
Primary site of tumor, no. (%) | 0.01 | 0.07 | ||||
Upper lobe | 353 (62.7) | 764 (66.0) | 214 (59.0) | 978 (65.2) | ||
Middle lobe | 37 (6.6) | 40 (3.5) | 18 (5.0) | 55 (3.7) | ||
Lower lobe | 173 (30.7) | 354 (30.6) | 131 (35.1) | 466 (31.1) | ||
Laterality, no. (%) | 0.11 | 0.54 | ||||
Left | 219 (38.9) | 498 (43.0) | 159 (43.8) | 630 (42.0) | ||
Right | 344 (61.1) | 660 (57.0) | 204 (56.2) | 869 (58.0) | ||