Table 3. Relationship between surfactant proteins and RAGE levels and general, clinical, pulmonary function and cardiopulmonary exercise data in the heart failure population.

		Immature SPB	Mature SPB	SPA	SPD	RAGE
AGE (yrs)	r value	0.265	0.013	0.256	0.152	0.066
	p value	0.012	NS	0.015	NS	NS
BMI (Kg/m2)	r value	–0.156	0.144	–0.052	–0.203	–0.285
	p value	NS	NS	NS	NS	<0.01
DLCO (%pred)	r value	–0.591	–0.088	–0.429	–0.393	–0.245
	p value	<0.01	NS	<0.01	<0.01	0.023
pVO2 (mL/Kg)	r value	–0.426	–0.012	–0.408	–0.292	–0.265
	p value	<0.01	NS	<0.01	<0.01	0.01
VE/VCO2 slope	r value	0.363	–0.037	0.455	0.333	0.406
	p value	<0.01	NS	<0.01	<0.01	<0.01
BNP (pg/mL)	r value	0.367	–0.008	0.502	0.412	0.490
	p value	<0.01	NS	<0.01	<0.01	<0.01
Hb (g/dL)	r value	–0.088	0.067	–0.170	–0.069	–0.285
	p value	NS	NS	NS	NS	<0.01
Creatinine (mg/dL)	r value	0.268	–0.253	0.245	0.184	0.367
	p value	<0.01	0.016	0.02	NS	<0.01

SPs, RAGE, Peak VO₂, VE/VCO₂ slope and BNP levels are transformed into natural logarithm. BMI: body mass index. For all abbreviations see table 1 and table 2.