Table 1—

Demographic and clinical characteristics of rheumatoid arthritis-associated interstitial lung disease patients

Subjects n206251
Age yrs69±665±1072±90.0010.150.08
Male sex5550750.030.700.11
Duration of RA yrs7 (3–30)2 (0–9)NANA0.03NA
FVC % pred66±2570±2069±210.720.390.63
DL,CO % pred50±2248±2141±160.100.560.07
  • Data are presented as mean±sd, percentage or median (interquartile range), unless otherwise indicated. RA-UIP: usual interstitial pneumonia (UIP) pattern in patients with rheumatoid arthritis (RA); RA-non-UIP: non-UIP pattern in patients with RA; IPF: idiopathic pulmonary fibrosis; FVC: forced vital capacity; DL,CO: diffusing capacity of the lung for carbon monoxide; NA: not applicable; % pred: percentage of the predicted value. #: versus RA-UIP.