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Median patient age was 73 years (range, 52 to 87), 75% were men, and all had underlying medical conditions, the most common of which were coronary heart disease and asthma (50%) and chronic obstructive pulmonary disease (25%). Many were obese, with a mean body mass index of 28.7 kg/m2
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Factor V Leiden, named after the city in the Netherlands where it was first described, is a …
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The percentage of people who have factor V Leiden depends on the population studied. Higher percentages are reported among people of European ancestry compared to people from other continents. In the United States, factor V Leiden has been found in 5 percent of individuals of European ancestry, 2 percent of individuals of African ancestry, 2 percent of individuals of Hispanic ancestry, 2 percent of Native Americans, and less than 1 percent of individuals of Asian ancestry.