Table 1– Characteristics of patients with lung disease directly associated with rheumatoid arthritis (RA-LD)
Age yrs65.2±9.8 (34–88)
Males/females60/84
Smoking status
 Current/former54
 Never90
Smoking history pack-yrs16.6±28.1 (0–120)
Age at rheumatoid arthritis onset yrs55.4±14.5 (18–82)
Age at RA-LD onset yrs65.2±9.8 (34–88)
Duration of rheumatoid arthritis yrs9.7±12.0 (-15–57)
Combined disease
 Two diseases
  UIP/bronchiectasis3
  UIP/bronchiolitis2
  Bronchiectasis/bronchiolitis8
  Bronchiolitis/OP2
 Three diseases
  UIP/NSIP/bronchiolitis1
  UIP/OP/pleuritis1
  Bronchiectasis/bronchiolitis/OP1
  Bronchiolitis/OP/pleuritis1
  • Data are presented as mean±sd (range) or n. UIP: usual interstitial pneumonia; OP: organising pneumonia; NSIP: nonspecific interstitial pneumonia.