(Circulation. 1995;92:290-295.)
© 1995 American Heart Association, Inc.
Articles |
Coronary Artery Disease in Heterozygous Familial Hypercholesterolemia Patients With the Same LDL Receptor Gene Mutation
From Département de médecine sociale et préventive, Faculté de Médecine, Université de Montréal, Montreal, Quebec, Canada (J.F., J.L.), and the Hyperlipidemia and Atherosclerosis Research Group, Clinical Research Institute of Montreal, Montreal, Quebec, Canada (J.F., S.L.-C., J.D.).
Correspondence to Dr S. Lussier-Cacan, Hyperlipidemia and Atherosclerosis Research Group, Clinical Research Institute of Montreal, 110 Pine Ave W, Montreal, Quebec, Canada H2W 1R7.
Background Familial hypercholesterolemia (FH), an autosomal codominant disease, is characterized by high levels of LDL cholesterol and a high incidence of coronary artery disease (CAD). To date, genetic heterogeneity has hindered the proper assessment of the relation between risk factors and CAD in FH patients.
Methods and Results We studied the association between CAD and common risk factors in a sample of 263 French Canadian FH patients (147 women, 116 men) carrying the same >10-kb deletion of the LDL receptor gene. Thirty-five women and 54 men had CAD. The mean age of onset of CAD was 45.6±12.7 years in women and 38.8±9.4 years in men. Multiple logistic regression analyses were performed to test the association between CAD and age, tendon xanthomas, cigarette smoking, hypertension, diabetes mellitus, apolipoprotein E polymorphism, total plasma cholesterol, triglycerides, VLDL cholesterol, LDL cholesterol, HDL cholesterol, and lipoprotein(a) [Lp(a)]. In FH women, significant multivariate predictors were age (odds ratio, 1.10 for 1 year; P<.0001), VLDL cholesterol (odds ratio, 3.85 for 1 natural log unit; P<.002), and LDL cholesterol (odds ratio, 1.42 for 1 mmol/L; P<.02). In FH men, age (odds ratio, 1.08 for 1 year; P<.0001) and HDL cholesterol (odds ratio, 0.14 for 1 mmol/L; P=.05) were significant predictors of disease. Lp(a) was not a significant predictor in univariate or multivariate analyses.
Conclusions This study suggests that increased risk of CAD in FH is not solely due to elevated LDL cholesterol levels and demonstrates a sex-specific lipoprotein influence on CAD in a large sample of FH patients carrying the same LDL receptor gene defect.
Key Words: hypercholesterolemia • coronary disease • risk factors
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