Table 1: Baseline and functional characteristics of the study population.

Type of IIPIPFCOPfNSIPcNSIP

Number of subjects2015114
Male18982
Female2632
Mean age, years (range)61 (44–80)57 (48–72)53 (48–61)48 (40–58)
Smoking history
 Current smokers0000
 Ex-smokers201273
FVC %pred
FEV1/FVC
TLC %pred
DLCO %pred

Data are presented as median (range), no (total), or mean SD, unless stated otherwise.
cNSIP: cellular nonspecific interstitial pneumonia, COP: cryptogenic organizing pneumonia, DLCO: diffuse lung capacity for carbon monoxide, fNSIP: fibrotic nonspecific interstitial pneumonia, FVC: forced vital capacity, IPF: idiopathic pulmonary fibrosis, TLC: total lung capacity.