FIGURE 3.

Summary of lung clearance index (LCI) in preschool children without lung disease (control), with cystic fibrosis (CF) and with other lung diseases in the multicentre setting. Dotted line represents upper limit of normal of 8.3. Open circles (CF Center at Airway Research Center North), closed circles (CF Center at Biomedical Research in Endstage and Obstructive Lung Disease Hannover), open triangles (CF Center at Translational Lung Research Center Heidelberg), closed triangles (CF Center at Universities of Giessen and Marburg Lung Center) and open squares (CF Center at Charité - Universitätsmedizin Berlin) represent data from individual children from the respective study site. Solid horizontal lines represent median values for each group. **: p<0.01 versus control group.