Table 1—

Demographic feature of the subjects.

Lone IPFIPF with lung cancerp-value
Subjects n21863
Age yr62.4±11.866.8±7.80.006
Sex M:F (% M)129:89 (59)61:2 (97)<0.001
Smoker %5989<0.001
Smoking pack-yrs21.3±22.241.5±22.1<0.001
  • IPF: idiopathic pulmonary fibrosis

  • M: male

  • F: female