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Intensive Care Medicine Experimental
Fig. 5 | Intensive Care Medicine Experimental

Fig. 5

From: HS-GC–MS analysis of volatile organic compounds after hyperoxia-induced oxidative stress: a validation study

Fig. 5

Correlation of volatile organic compounds (VOCs) and clinical oxygen exposure. Spearman’s correlation (ρ) of hexane (A), octane (B), and decane (C) with oxygen exposure in patients on the first measurement day is shown. Quantile regression was used to estimate the median (orange line) VOC intensity and interquartile range (grey lines) as a function of PaO2. Within subject correlation of VOCs and PaO2 over repeated measures is shown in D, 1 represents a strong positive correlation (red) and − 1 a strong negative correlation (blue). **, P < 0.01; ***, P < 0.001

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