Time of first bronchoscopy since the onset of the disease Time of first bronchoscopy since the onset of the disease Times of bronchoscopy Times of bronchoscopy Mucus embolus Mucus embolus Tree-like bronchial shaped changes Tree-like bronchial shaped changes Necrotizing pneumonia Necrotizing pneumonia
Within 10 days After 10 days ≤twice ≥ three times Yes No Yes No Yes No
Cases 142 71 183 30 47 166 8 205 6 207
Obliterans cases 9 13 4 18 22 0 8 14 6 16
P value P<0.007 P<0.007 P<0.001 P<0.001 P<0.001 P<0.001 P<0.001 P<0.001 P<0.001 P<0.001