Fig. 1: Distribution of exhaled alveolar and inhaled room air concentrations of isoprene.
From: Origin of breath isoprene in humans is revealed via multi-omic investigations
Y-axis represents isoprene concentrations (ppbV). X-axis represents the total number of recruitments (n = 2000) along with different age groups/subgroups (with corresponding number of screened subjects) and total number of inspiratory samples (n = 2000). The adult group (aged 20–60 years) is sub-grouped into three colored boxes viz. isoprene normal (n = 1320; exhaled isoprene concentrations >50 ppbV), isoprene deficient (n = 64; concentrations <50 ppbV) and isoprene absent healthy (n = 5), respectively. Statistical significances of differences in isoprene concentrations between different age groups/subgroups were tested by means of one-way ANOVA on ranks (p-value ≤ 0.005). From all pairwise-multiple comparisons, statistically significant differences with respect to ‘isoprene normal adults’ are marked with green-colored ‘*’. The group containing the ‘total recruited subjects’ was not compared statistically to avoid overlaps of exhaled isoprene concentrations from different age groups and subgroups.
