Figure 3.

Box-plots of 2,3-butanedione concentrations in a cross-sectional study of CF patients and paired non-CF volunteers. (a) Breath samples from seven CF patients and five non-CF volunteers showing 2,3-butanedione levels. Patient CF1 and H5 are the same individuals shown in Figure 2. Patient CF5 was completing a 4 week course of intravenous tobramycin and aztreonam at the time of sampling, and patients CF6 and CF7 were undergoing antibiotic treatment for exacerbation (see Table 1 for clinical information). (b) Box-plot of samples grouped by type of antibiotic therapy.