Variables | Period between 2003 and 2008 | Period between 2009 and 2013 | ||||
---|---|---|---|---|---|---|
Lobectomy (n = 98) | Lobectomy with MLND (n = 215) | p | Lobectomy (n = 82) | Lobectomy with MLND (n = 295) | p | |
Mean ± SD Age (years) | 63.55 ± 9.56 | 65.53 ± 8.83 | 0.08 | 64.51 ± 10.45 | 64.65 ± 9.08 | 0.91 |
Sex, no. (%) | 0.09 | 0.15 | ||||
male | 46 (46.9) | 79 (36.7) | 36 (43.9) | 104 (35.3) | ||
female | 52 (53.1) | 136 (63.3) | 46 (56.1) | 191 (64.7) | ||
Race, no. (%) | 0.90 | 0.89 | ||||
White | 88 (89.8) | 192 (89.3) | 67 (81.7) | 243 (82.4) | ||
Black/ Others | 10 (10.2) | 23 (10.7) | 15 (18.3) | 52 (17.6) | ||
Histology, no. (%) | 0.67 | 0.22 | ||||
Squamous cell carcinoma | 30 (30.6) | 71 (33.0) | 15 (18.3) | 73 (24.7) | ||
Adenocarcinoma | 68 (69.4) | 144 (67.0) | 67 (81.7) | 222 (75.3) | ||
Grade, no. (%) | 0.18 | 0.71 | ||||
I | 16 (16.3) | 42 (19.5) | 24 (29.3) | 91 (30.8) | ||
II | 59 (60.2) | 99 (46) | 34 (41.5) | 135 (45.8) | ||
III | 19 (19.4) | 59 (27.4) | 22 (26.8) | 59 (20.0) | ||
IV | 0 | 1 (0.5) | 0 | 1 (0.3) | ||
Unknown | 4 (4.1) | 14 (6.5) | 2 (2.4) | 9 (3.1) | ||
Primary site of tumor, no. (%) | 0.86 | 0.71 | ||||
Upper lobe | 70 (71.4) | 147 (68.4) | 51 (62.2) | 192 (65.1) | ||
Middle lobe | 6 (6.1) | 15 (7.0) | 8 (9.8) | 21 (7.1) | ||
Lower lobe | 22 (22.4) | 53 (24.7) | 23 (28) | 82 (27.8) | ||
Laterality, no. (%) | 0.31 | 0.94 | ||||
Left | 39 (39.8) | 72 (33.5) | 29 (35.4) | 103 (34.9) | ||
Right | 59 (60.2) | 143 (66.5) | 53 (64.6) | 192 (65.1) |