Figure 4From: Airway inflammation and mannitol challenge test in COPDROC curve. The curve of sensitivity against 100-specificity is based on using reactivity to mannitol, given as RDR values (%fall.mg), to predict eosinophilic COPD (>2.5%) in hypertonic saline (left) and mannitol-induced (right) sputum. Dotted line: line of identity.Back to article page