Fig. 2From: Relationship between concavity of the flow-volume loop and small airway measures in smokers with normal spirometryNo significant correlation between peripheral concavity and Sacin (r = 0.20, p = 0.07), global concavity and Scond (r = 0.10, p = 0.34), peripheral concavity and reactance (X5) (r = − 0.09, p = 0.38), global concavity and resistance (R5) (r = 0.10, p = 0.35)Back to article page