From: Inhalable particulate matter and mitochondrial DNA copy number in highly exposed individuals in Beijing, China: a repeated-measure study
Office workers(obs=120)
Truck drivers(obs=120)
p-value
Mean ± SD
Unadjusted
1.05 ± 0.22
1.04 ± 0.22
0.73
Adjusted a
1.09 ± 0.25
1.05 ± 0.24
0.40