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Table 3 Mean mitochondrial DNA copy number (MtDNAcn) in truck drivers and office workers

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 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
  1. a Adjusted for age, sex, BMI, pack-years, smoking status (never, former, current), and work hours per week.