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. Author manuscript; available in PMC: 2012 Jan 11.
Published in final edited form as: Eur Respir J. 2008 May 28;32(4):1004–1008. doi: 10.1183/09031936.00015808

TABLE 4.

Changes in pulmonary function test results in treated and untreated patients with idiopathic pulmonary fibrosis over time

Treated Untreated p-value
Patients n 130 51
FVC −0.52 ± 1.1 −0.44 ± 1.1 ns
DL,CO −0.78 ± 1.8 −0.83 ± 1.8 ns
KCO −0.04 ± 1.9 −0.18 ± 1.8 ns
PA–a,O2 mmHg 0.22 ± 0.95 0.2 ± 0.89 ns

Unless otherwise stated, data are presented as the mean ± sd percentage of change in absolute values or difference in pressure (mmHg) with respect to initial assessment, divided by the length of follow-up in months. FVC: forced vital capacity; ns: not significant; DL,CO: diffusion capacity of the lung for carbon monoxide; KCO: ratio between DL,CO and alveolar volume; PA–a,O2: alveolar arterial oxygen tension difference. 1 mmHg=0.133 kPa.