TABLE 4.

PREDICTORS OF PULMONARY MEAN ARTERIAL PRESSURE FROM MULTIPLE REGRESSION ANALYSIS (N = 79)

	Partial Regression Coefficient	P Value
%CSA<5 (%)	−23.88	<0.0001
%LAA−950	−0.09	0.054
FEV1, % predicted	−0.04	0.549
DlCO, % predicted	−0.13	0.022
PaO2	−0.08	0.067
Age	−0.01	0.936
Sex	−0.37	0.453
BMI	0.01	0.268

Definition of abbreviations: BMI = body mass index; DL_CO = diffusing capacity of the lung for carbon monoxide; = pulmonary arterial mean pressure; %LAA₋₉₅₀ = CT measurement of the percentage of low attenuation area less than −950 HU, defined as emphysema.