Table 2.

Pulmonary Diffusion Capacity and Alveolar Volume

	FT	BPD	P Value*
DlCO-RA STPD, ml/min/mm Hg	4.0 (1.3)	3.3 (1.0)	0.017
DlCO-High O2 STPD, ml/min/mm Hg	2.0 (0.7)	1.7 (0.5)	0.036
Va, ml	611.1 (229.7)	586.6 (185.4)	0.59

Definition of abbreviations: BPD = bronchopulmonary dysplasia; Dl_CO-High = pulmonary diffusion capacity of the lung for carbon monoxide measured with hyperoxic test gas; Dl_CO-RA = pulmonary diffusion capacity of the lung for carbon monoxide measured with normoxic test gas; FT = healthy full-term; STPD = standard temperature and pressure, dry.

Values are means (SD) for all variables.

^*Two-sample t test.