The role of the apolipoprotein E polymorphism in the prediction of coronary artery disease age of onset

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Abstract
We investigated the role of the apolipoprotein (Apo) E polymorphism in the prediction of CAD age of onset in a sample of unrelated living male (n = 65) and female (n = 54) Caucasian subjects diagnosed with CAD. Cumulative distributions of age at the first diagnosis of CAD were estimated for each Apo E genotype and tested for homogeneity using the log-rank test. The Apo epsilon 33 genotype was used as a reference group for all hypothesis tests. Analyses were performed separately in males and females. We found evidence suggesting that the presence of the Apo epsilon 32 genotype in males is associated with a significantly earlier CAD age of onset. These results suggest that the Apo E polymorphism may be a gender-specific predictor of CAD age of onset.