Table 1. Clinicopathological characteristics of patients.
| All patients | Unexpected disease | Expected disease | p value | |||||
|---|---|---|---|---|---|---|---|---|
| N = 225 | (%) | N = 41 | (%) | N = 184 | (%) | |||
| Age (years) | Median (Range) | 68 | (25–85) | 65 | (33–78) | 69 | (25–85) | <0.01* |
| Gender | Male | 115 | (51) | 19 | (46) | 96 | (52) | 0.60 |
| Female | 110 | (49) | 22 | (54) | 88 | (48) | ||
| Smoking status | Ever | 112 | (50) | 22 | (54) | 90 | (49) | 0.61 |
| Never | 113 | (50) | 19 | (46) | 94 | (51) | ||
| Tumor location | Right upper lobe | 78 | (35) | 9 | (22) | 69 | (38) | 0.09 |
| Right middle lobe | 17 | (8) | 2 | (5) | 15 | (8) | ||
| Right lower lobe | 48 | (21) | 8 | (19) | 40 | (21) | ||
| Left upper lobe | 55 | (24) | 13 | (32) | 42 | (23) | ||
| Left lower lobe | 27 | (12) | 9 | (22) | 18 | (10) | ||
| Clinical T factor | T1a | 86 | (38) | 4 | (10) | 82 | (44) | |
| T1b | 79 | (35) | 19 | (46) | 60 | (33) | <0.01 | |
| T2a | 49 | (22) | 16 | (39) | 33 | (18) | ||
| T2b or greater | 11 | (5) | 2 | (5) | 9 | (5) | ||
| Operative procedure | Lobectomy or greater | 202 | (90) | 38 | (93) | 164 | (89) | 0.78 |
| Segmentectomy | 23 | (10) | 3 | (7) | 20 | (11) | ||
| Tumor size (mm) | Median (Range) | 24 | (6–99) | 33 | (15–65) | 22 | (6–99) | <0.01* |
| Pathological T factor | T1a | 69 | (31) | 5 | (12) | 64 | (35) | |
| T1b | 72 | (32) | 6 | (14) | 66 | (36) | <0.01 | |
| T2a | 64 | (28) | 22 | (54) | 42 | (23) | ||
| T2b or greater | 20 | (9) | 8 | (20) | 12 | (7) | ||
| Pleural invasion | Negative | 182 | (81) | 14 | (34) | 155 | (84) | 0.01 |
| Positive | 43 | (19) | 27 | (66) | 29 | (16) | ||
| Lymphovascular invasion | Negative | 100 | (44) | 2 | (5) | 98 | (53) | <0.01 |
| Positive | 125 | (56) | 39 | (95) | 86 | (47) | ||
*Mann–Whitney U-test.