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Table 5 Comparisons of EBUS-GS and other characteristics according to the severity of pulmonary emphysema

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

Variables Mild emphysema (n = 70) Moderate-to-severe emphysema (n = 59) P-value
Mean diameter of lesion, mm 27 (22–39) 28 (19–39) 0.709
Distance from pleura to lung lesion, mm 3 (0–22) 0 (0–27) 0.927
Number of brushing cytology tests 3 (3–3) 3 (2–3) 0.371
Number of biopsies 6 (6–6) 6 (6–7) 0.379
Lesion location
 Right upper lobe 25 (36) 11 (19) 0.072
 Right middle lobe 4 (6) 8 (14)  
 Right lower lobe 16 (23) 15 (25)  
 Left upper division 12 (17) 10 (17)  
 Left lingular division 1 (1) 6 (10)  
 Left lower lobe 12 (17) 9 (15)  
Bronchus sign
 Positive 62 (89) 40 (68) 0.004
 Negative 8 (11) 19 (32)  
Character of lesion on CT
 Solid 62 (89) 54 (92) 0.484
 Mixed 0 (0) 1 (2)  
 Ground-glass opacity 1 (1) 0 (0)  
 Cavitary 7 (10) 4 (7)  
EBUS finding
 Within lesion 63 (90) 43 (73) 0.011
 Adjacent to or outside lesion 7 (10) 16 (27)  
  1. FEV1 forced expiratory volume in 1 s, FVC forced vital capacity, EBUS endobronchial ultrasound, CT computed tomography