Table 4

Age-adjusted mortality (relative risk) in chronic obstructive pulmonary disease (COPD) among male construction workers according to different exposures among never-smokers

ExposureDeaths in COPD nRelative risk 95% CIIndividuals nPerson-years
Controls71.049920861028
Inorganic dust282.38 (1.59–3.44)579271003006
Gases and irritants112.92 (1.46–5.22)22406356566
Fumes102.72 (1.31–3.68)23348400167
Wood dust10.53 (0.01–2.94)9840156078
Any exposure312.11 (1.43–3.00)761031295542
  • CI: confidence interval

  • A man can be included in more than one exposed category

  • Analysed with the person-years method stratified for smoking and age