Table 1.

Demographic and pulmonary function characteristics

Variable	Old n=21	Old+ILA n=15	P value
Age (years)	67±6	70±9	0.2
Gender, male (%)	3 (14)	12 (80)	0.0001
Smoke, former (%)	8 (38)	12 (80)	0.01
FVC (% predicted)	104±33	99.8±13	0.7
FEV1 (% predicted)	103±20	105±20	0.7
DLCO (% predicted)	113±21	105±15	0.2

DLCO, diffusion capacity for carbon monoxide; FEV1, forced expiratory lung volume in the first second; FVC, forced vital capacity; ILA, interstitial lung abnormalities.