Table 1 Baseline characteristics of the study patients
Variables | With emphysema (n = 129) | Without emphysema (n = 264) | P-value |
|---|---|---|---|
Age, years | 71 (65–76) | 69 (61–75) | 0.064 |
Male gender | 126 (98) | 139 (53) | < 0.001 |
Mean diameter of lesion, mm | 28 (21–39) | 27 (19–35) | 0.135 |
Distance from pleura, mm | 1 (0–25) | 10 (0–23) | 0.289 |
Pulmonary function testa | |||
FEV1, % predicted value | 79 (66–91) | 86 (75–97) | < 0.001 |
FVC, % predicted value | 82 (74–90) | 85 (75–96) | 0.066 |
FEV1/FVC, % | 69 (60–75) | 75 (70–80) | < 0.001 |
Lesion location | |||
Right upper lobe | 36 (28) | 64 (24) | 0.525 |
Right middle lobe | 12 (9) | 19 (7) | |
Right lower lobe | 31 (24) | 64 (24) | |
Left upper division | 22 (17) | 63 (24) | |
Left lingular division | 7 (5) | 8 (3) | |
Left lower lobe | 21 (16) | 46 (17) | |
Character of lesion on CT scan | |||
Solid | 113 (88) | 234 (89) | 0.456 |
Mixed | 5 (4) | 16 (6) | |
Ground-glass opacity | 2 (2) | 4 (2) | |
Cavitary | 9 (7) | 10 (4) | |