Table 1– Demographics and baseline characteristics
Subjects n748
Age years66±7.6
 Male535 (71.5)
 Female213 (28.5)
 Caucasian703 (94.0)
 Other45 (6.0)
Country of residence
 USA521 (69.7)
 Other227 (30.3)
Treatment assignment
 Interferon γ-1b496 (66.3)
 Placebo252 (33.7)
 Honeycombing on HRCT653 (87.3)
 Surgical lung biopsy411 (54.9)
 History of cardiovascular disease213 (28.5)
 Supplemental oxygen use115 (15.4)
Physiological characteristics
 FVC % predicted72.5±12.8
DLCO % predicted47.5±9.2
 6MWT distance m397±107
  • Data are presented as mean±sd or n (%). HRCT: high-resolution computed tomography; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide; 6MWT: 6-min walk test.