Fig. 3From: Predictors and reproducibility of exercise-induced bronchoconstriction in cold airReceiver-operating characteristic curve for predicting a positive decrease in FEV1 after ECC. PD20FEV1 of methacholine: Optimal cut-off, 1.36 mg; sensitivity, 86%; specificity, 52%; and AUC, 0.69 (p < 0.05). FEV1 decrease during exercise challenge in a cold chamber: Optimal cut-off, 8.5%; sensitivity, 75%; specificity, 78%; and AUC, 0.78 (p < 0.001)Back to article page