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Table 1 Baseline characteristics of the study patients

From: Clinical outcomes of radial probe endobronchial ultrasound using a guide sheath for diagnosis of peripheral lung lesions in patients with pulmonary emphysema

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)  
  1. a Pulmonary function test results were available for 245 patients without pulmonary emphysema (93%)
  2. IQR interquartile range, FEV1 forced expiratory volume in 1 s, FVC forced vital capacity, CT computed tomography