Fig. 1From: Ultrasound-assessed diaphragmatic impairment is a predictor of outcomes in patients with acute exacerbation of chronic obstructive pulmonary disease undergoing noninvasive ventilationStudy population diagram. AECOPD, NIV Noninvasive ventilation, RICU, ILD Interstitial lung disease, IOT, DD, Pdi, US UltrasoundBack to article page