From: Genome-wide DNA methylation and long-term ambient air pollution exposure in Korean adults
Characteristics | The Korean COPDa cohort (N = 100) |
---|---|
Age, years | 72.8 ± 6.3 |
Male | 66 (66%) |
Body mass index, kg/m2 | 22.9 ± 2.9 |
COPD, case | 60 (60%) |
Cigarette smoking | |
  Never | 39 (39%) |
  Former | 30 (30%) |
  Current | 31 (31%) |
Pack-years | |
  Former smoker | 28.9 ± 19.6 |
  Current smoker | 35.7 ± 19.1 |
Annual average air pollution concentration at residential addresses | |
  PM10, μg/m3 | 45.1 ± 2.0 |
  NO2, ppb | 13.1 ± 1.4 |