Fig. 3. ROC curve to predict the desaturation during the 6MWT.

ROC receiver operating characteristic, 1STST 1 min sit-to-stand test, 6MWT 6 min walk test, SpO₂ pulse oxygen saturation, FVC forced vital capacity, DLCO diffusion lung capacity for carbon monoxide, PaO2 arterial partial pressure of oxygen, AUC area under the curve.