Fig. (1) Medians and interquartile range of FEV₁, FVC, oxygen-saturation and body weight during the seasons 2000/2001, 2001/2002, 2002/2003 and 2003/2004 of the Israel rehabilitation programs. Additional measurements at the end of the first week (on average on day 9.2) of the 3-week stay were performed prospectively to determine when potential effects of the intervention become evident. The paired data from the 3 time points were compared by Friedman-ANOVA, followed by Dunn`s multiple comparison test.