Table 3

Association of cumulative air pollution exposure and disease progression

ExposureIncreaseHR (95% CI)p Value
O310 µg/m31.06 (0.74 to 1.54)0.72
NO210 µg/m31.09 (0.85 to 1.40)0.52
PM1010 µg/m31.03 (0.51 to 2.08)0.92
PM2.510 µg/m31.89 (0.68 to 5.23)0.22
  • Cox proportional hazards model adjusted on age, FVC% predicted at base line and DLco% predicted at baseline.

  • NO2, nitrogen dioxide; O3, ozone; PM10 and PM2.5, particles with a 50% cut-off aerodynamic diameter of 10 µm and 2.5 µm.