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Plasma fibrinogen levels are associated with a strong family history of myocardial infarction

Family history of myocardial infarction (MI) is a known risk factor for coronary artery disease (CAD). The aim of the present study was to investigate whether there is a specific risk factor profile for CAD in individuals with a strong family history of MI occurring at any age. The Study of Health in Pomerania is a cross-sectional, population-based study in the north-east of Germany. A random sample was drawn from the population aged 20–79 years. From 3793 subjects with siblings, 34 (0.9%) reported a history of MI in at least one parent and one sibling. We matched these cases with 136 controls (1 : 4 matching for age, sex and presence of sibling). We then compared cases and controls with respect to known risk factors for MI. Subjects with a dual parental and sibling history of MI had higher plasma fibrinogen levels (3.5 versus 3.0 g/l, respectively), and also more often angina pectoris than the matched controls (P < 0.05). Multivariable analysis revealed an independent association between dual parental and sibling history of MI and plasma fibrinogen levels. We conclude that plasma fibrinogen levels may indicate an inheritable risk for CAD in subjects with a strong family history of MI.