Table 3—

Indicators of longer survival among idiopathic pulmonary fibrosis patients

1) Younger age (<50 yr)
2) Female sex
3) Shorter symptomatic period (≤1 yr) with less dyspnoea, relatively preserved lung function
4) Presence of ground glass and reticular opacities on HRCT
5) Increased proportion of lymphocytes (20–25 %) in BAL fluid
6) A beneficial response or stable disease 3–6 months after initial corticosteroid therapy
7) A history of “current” cigarette smoking at the time of diagnosis has been associated with improved survival – this finding remains unexplained