. Author manuscript; available in PMC: 2009 Sep 8.

Published in final edited form as: J Thorac Cardiovasc Surg. 2008 Aug;136(2):452–461. doi: 10.1016/j.jtcvs.2007.12.036

Table 4.

Proportional hazards model of mortality during up to 5 year follow-up after primary CABG surgery

	With preoperative BNP in model (n=924^*; AIC = 761.97)			With preoperative BNP in model (n=924^*; AIC = 765.04)
Predictor	Hazard Ratio	95% Confidence Interval	P value	Hazard Ratio	95% Confidence Interval	P value
Log₁₀ preoperative BNP	1.89	(1.08, 3.33)	0.026	-	-	-
Age (ten year increment)	1.71	(1.30, 2.26)	0.0001	1.84	(1.40, 2.42)	<0.0001
>30 pack year smoking	2.38	(1.39, 4.07)	0.002	2.50	(1.46, 4.27)	0.0008
Urgent procedure	1.85	(1.05, 3.25)	0.033	1.94	(1.11, 3.41)	0.021
BMI > 30 kg/m²	2.13	(1.26, 3.62)	0.005	1.93	(1.15, 3.25)	0.013
Preoperative ACE-Inhibitor	0.58	(0.34, 0.99)	0.044	0.57	(0.34, 0.98)	0.042
LVEF (%)	0.98	(0.96, 1.00)	0.060	0.97	(0.95, 0.99)	0.005

AIC indicates Akaike information criterion; BMI indicates body mass index; ACE indicates angiotensin converting enzyme; LVEF indicates left ventricular ejection fraction

99 subjects were missing one or more of the model’s predictor variables and are not included in this analysis.