Figure 1.
Mean mtDNA copy number by quartiles of personal PM2.5 and BaP. (A) In all participants, by quartiles of PM2.5; (B) in all participants, by quartiles of BaP; (C) in smoky coal users, by quartiles of PM2.5; (D) in smoky coal users, by quartiles of BaP; (E) in users of smokeless coal, wood, plant and other fuels, by PM2.5; and (F) in users of smokeless coal, wood, plant and other fuels, by BaP. Whiskers represent standard deviations. Trends between quartiles of exposure and mtDNAcn were analyzed with Spearman correlations. For PM2.5: Q1 = 41–117 μg/m3, Q2 = 118–166 μg/m3, Q3 = 167–233 μg/m3, and Q4 = ≥234 μg/m3. For BaP: Q1= 2–17 ng/m3, Q2= 18–38 ng/m3, Q3 = 39–76 ng/m3, Q4= ≥77 ng/m3. P-values <0.05 were considered statistically significant .