Table 2

Effect of smoking on the adjusted risk of pulmonary fibrosis, according to gender and occupational exposure

PF OR (95% CI)IPF OR (95% CI)
WomenMenWomenMen
No occupational exposure1.10 (0.50 to 2.42)1.97 (0.64 to 6.13)1.12 (0. 49 to 2.59)1.44 (0.43 to 4.83)
Occupational exposure1.10 (0.52 to 2.34)4.63 (2.08 to 10.33)1.32 (0.58 to 3.03)2.96 (1.34 to 6.52)
  • OR (95% CI) for the effect of smoking versus no smoking on the risk of developing PF and IPF, estimated using Mantel-Haenszel analysis controlled for year of birth and year of diagnosis. Smoking was defined as the presence of ever-smoking earlier than 10 years before the diagnosis.

  • IPF, idiopathic pulmonary fibrosis; PF, pulmonary fibrosis.