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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Ann Thorac Surg. 2015 Feb 4;99(4):1239–1247. doi: 10.1016/j.athoracsur.2014.10.070

Table 2.

Incremental Risk Factors for Aortic Valve Explant for Structural Valve Deterioration

Factor Coefficient ± SE p Value
Preoperative factors
 Younger age
 Age   0.37 ± 0.075 <0.0001
 Agea −6.2 ± 1.2   <0.0001
 Concomitant TV procedure 0.88 ± 0.39   0.02
Postoperative factors
 Discharged on lipid-lowering medication   2.1 ± 0.18 <0.0001
 Higher postoperative AV mean gradient
 Mean gradientb 0.93 ± 0.23 <0.0001
 Mean gradientc 0.062 ± 0.014 <0.0001
 Higher postoperative AV peak gradient
 Peak gradientd   3.9 ± 0.40 <0.0001
 Peak gradiente −0.46 ± 0.074 <0.0001
a

Exp(age/50), exponential transformation.

b

(15/postoperative AV mean gradient), inverse transformation.

c

(Postoperative AV mean gradient/15)2, squared transformation.

d

(Postoperative AV peak gradient/30), scaled transformation.

e

(Postoperative AV peak gradient/30)2, squared transformation.

AV = aortic valve; SE = standard error; TV = tricuspid valve.