Pulmonary function of patients with usual interstitial pneumonia (UIP) and nonspecific interstitial pneumonia (NSIP)
| Test | UIP | NSIP | p-value |
| FEV1 | 49 (79±20) | 6 (52±17) | 0.005 |
| VC | 49 (72±18) | 6 (63±22) | ns |
| FEV1/VC % | 48 (80±10) | 5 (67±36) | ns |
| TLC | 33 (74±22) | 3 (92±42) | ns |
| RV | 33 (79±34) | 3 (144±69) | 0.06 |
| D L,CO | 41 (50±20) | 4 (39±16) | ns |
| K CO | 39 (67±32) | 4 (55±35) | ns |
Data are presented as n (mean±sd % pred)
FEV1: forced expiratory volume in one second
VC: vital capacity
TLC: total lung capacity
RV: residual volume
DL,CO: carbon monoxide diffusing capacity
KCO: carbon monoxide transfer coefficient