Prediction of exercise-induced desaturation in COPD patients without resting hypoxemia: a retrospective study

BMC Pulmonary Medicine

Table 4 ROC curve analysis for predicting EID

Variables	AUC	Cut-off value	Sensitivity	Specificity	P
CAT score	0.727	15	0.753	0.66	< 0.001
D_LCO SB%pred (%)	0.689	50.45	0.889	0.425	0.001
D_LCO/VA%pred (%)	0.707	80.90	0.733	0.589	< 0.001
mean density (HU)	0.671	− 856.46	0.808	0.593	0.033
PD15 (HU)	0.691	− 955.00	0.692	0.704	0.017
emphysema volume (ml)	0.668	338.14	0.689	0.667	0.003
%LAA (%)	0.656	7.63%	0.635	0.667	0.005

ROC Receiver operating characteristic; EID Exercise-induced desatuation; CAT COPD Assessment Test; AUC Area under curve; D_LCO SB% pred Lung carbon monoxide diffusion as a percentage of predicted value; D_LCO/VA% pred Lung carbon monoxide diffusion per liter of alveolar air volume as a percentage of predicted value; PD15 15th percentile point; %LAA % Low attenuation areas

ISSN: 1471-2466