Fig. 1From: Diagnostic sensitivity of 2-day cardiopulmonary exercise testing in Myalgic Encephalomyelitis/Chronic Fatigue SyndromeReceiver operator characteristic (ROC) curves for absolute and percentage change in work rate at ventilatory threshold from Day 1 to Day 2 of testing. Dashed line absolute change, dotted line percentage change, solid line indicator of matched specificity and sensitivityBack to article page