Characteristics of unclassifiable interstitial lung disease patients

CountryYearsUnclassifiable n/total N (%)With surgical biopsy %Male %Age yearsFVC
Spain1995–200473/500 (14.6)26.24766.7±13.6
China1999–200938/251 (15.1)100
Spain2000–200126/511 (5.1)22.7
USA2000–2011132/1370 (9.6)315367.8±12.969.0±22.147.6±19.7
Denmark2003–200962/431 (14)344559.3±14.573.7±22.855.8±21.4
Australia2011–201323/232 (9.9)

Data are presented as mean±sd, unless otherwise stated. Blank cells represent data that were not reported. FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide. Reproduced and modified from [39] with permission.