Figure 6.

Heatmaps of associations between biomarkers and MRI metrics. A and B: colormaps showing Spearman’s correlation coefficients ρ of the various associations between biomarkers and MRI metrics acquired respectively before and after the e-cig vaping challenge. Comparison pairs are indicated in bold for P values <0.05 (see key for actual P values). Acronyms are listed in Tables 2-, and 3. Notice that the association between flow-mediated dilation (FMD) and hematocrit (Hct) refers to prevaping.