Long-term clinical course and outcome of interstitial pneumonia with autoimmune features.

Respirology : Official Journal of the Asian Pacific Society of Respirology
Ho Cheol KimJin Woo Song

Abstract

Idiopathic interstitial pneumonia (IIP) with autoimmune features that does not fulfil connective tissue disease (CTD) criteria has been recently defined as interstitial pneumonia with autoimmune features (IPAF). However, its long-term clinical course and outcome are poorly understood. We included consecutive patients diagnosed with IIP (n = 586) or CTD-related interstitial lung disease (CTD-ILD, n = 149). Some patients with IIP were reclassified as IPAF based on recent guidelines. The median follow-up period was 45 months. Among the IIP patients, 109 (18.6%) were reclassified as IPAF. Compared to the non-IPAF-IIP group, the IPAF group had slower diffusing capacity of the lung for carbon monoxide (DLCO ) and total lung capacity declines, and more frequent CTD development during follow-up periods. The prognosis of the IPAF was better than that of the non-IPAF-IIP and similar to that of the CTD-ILD. IPAF was associated with better prognosis in the IIP cohort on univariate but not on multivariate analysis. Usual interstitial pneumonia (UIP) pattern, old age and low DLCO independently predicted mortality in the IPAF group. Compared to the non-IPAF-IIP group, the IPAF group had slower lung function declines and more frequent CTD deve...Continue Reading

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Citations

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