Figure 2From: Early fiberoptic bronchoscopy during non-invasive ventilation in patients with decompensated chronic obstructive pulmonary disease due to community-acquired-pneumonia(a) Changes of Kelly--Matthay and (b) cough efficiency score after two hours of noninvasive ventilation (NPPV). Values are expressed as mean (standard deviation). * P < 0.005 vs. baseline.Back to article page