Demographic and functional data of the study population
| Controls | IPF | p-values# | |
| Subjects n | 18 | 17 | |
| Males/females | 11/7 | 7/10 | |
| Age | 46.6±20.5 | 62.7±10.1 | 0.0005 |
| FEV1 % pred | 106.4±16.7 | 77.4±18.1 | 0.0001 |
| FVC % pred | 105.7±14.8 | 74.1±18.5 | <0.0001 |
| FEV1/FVC | 85.7±6.5 | 93.9±7.2 | 0.01 |
| DL,CO % | 98.3±10.3 | 52.2±13.9 | <0.0001 |
| Pa,O2 mmHg | 89.4±2.2 | 67.3±10.7 | <0.0001 |
Data are presented as mean±sd, unless otherwise stated. IPF: idiopathic pulmonary fibrosis; FEV1: forced expiratory volume in one second; FVC: forced vital capacity; DL,CO: carbon monoxide diffusing capacity of the lung; Pa,O2: arterial oxygen tension. #: using t-test. kPa = 0.133×mmHg.