TABLE 1

Subject demographics and clinical characteristics

Normal controlIPF
Total number n1113
Age years41±15.164±5.06
Sex (F/M) n6/56/7
Body mass index kg·m−2NA26.69±3.03
Smoking status: current/ex-smoker/never-smoker nNonsmokers0/7/6
Smoking pack-years20.84±23.16
Lung physiology
 FEV1 L1.70±0.40
 FEV1 % predicted60.17±12.22
 FVC L1.97±0.51
 FVC % predicted53.5±12.98
DLCO mL·min−1·mmHg−15.91±2.92
DLCO corrected % predicted25.85±15.30

Values given as mean±sd unless otherwise stated. IPF: idiopathic pulmonary fibrosis; F: female; M: male; NA: not available; FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; DLCO: diffusing capacity of the lungs for carbon monoxide.