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Scatter plots showing the correlation between the ventilation defect volume ratio with selected variables in children with asthma. There was a strong inverse correlation between ventilation defect volume ratio and the FEV1/FVC % (A.) and the FEF25–75 % predicted (B.) The ventilation defect volume ratio also correlated significantly with other clinical markers including the percentage of blood eosinophils (C) and the asthma control test (D).
