Short answer · Medically reviewed summary · Last updated: 2026-04-07
Factor V Leiden is the most common inherited thrombophilia, affecting approximately 3% to 7% of the general Caucasian population, though its clinical expression varies significantly based on genetic inheritance patterns. Prevalence and Demographic Distribution Because Factor V Leiden is a genetic mutation, it is present from birth, though it is not considered a "rare disease" in the traditional sense due to its relatively high frequency in specific populations. While it is highly prevalent among individuals of European descent, it is significantly less common in populations of African, Asian, or Native American ancestry.
2 people with Factor V Leiden have shared their first-person experience on this question at DiseaseMaps.
What is the prevalence of Factor V Leiden?
Prevalence of Factor V Leiden: how many people are affected worldwide, differences by sex and region, with sources.
Factor V Leiden is the most common inherited thrombophilia, affecting approximately 3% to 7% of the general Caucasian population, though its clinical expression varies significantly based on genetic inheritance patterns.
Prevalence and Demographic Distribution
Because Factor V Leiden is a genetic mutation, it is present from birth, though it is not considered a "rare disease" in the traditional sense due to its relatively high frequency in specific populations. While it is highly prevalent among individuals of European descent, it is significantly less common in populations of African, Asian, or Native American ancestry. The condition affects males and females with equal frequency; however, the clinical manifestation of clots is often influenced by hormonal factors, such as the use of oral contraceptives or pregnancy, which can increase risk specifically in females.
Clinical Presentation and Diagnosis
Most individuals with Factor V Leiden never develop a blood clot, meaning many remain undiagnosed throughout their lives. Because the condition is often asymptomatic until a venous thromboembolism (VTE) occurs, incidence rates of "new cases" are difficult to track; clinical presentation usually occurs in adulthood, though it can occur in pediatric populations under specific triggers. The primary challenge in gathering accurate data is that many carriers only discover their status after a symptomatic event, leading to a significant underestimation of the total carrier population in global health registries.
Community Perspectives
At DiseaseMaps.org, our community of over 500 members highlights the diverse ways Factor V Leiden impacts daily life. While clinical data often focuses on the risk of deep vein thrombosis or pulmonary embolism, our members frequently share the emotional and lifestyle adjustments required when managing long-term anticoagulation therapy. This real-world data complements clinical literature by illustrating that even in a common genetic condition, the patient experience is deeply personal and requires tailored care.
Medical Disclaimer: This information is for educational purposes and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of a hematologist or primary care physician regarding any medical condition.
References
- NIH Genetic and Rare Diseases Information Center (GARD): Factor V Leiden Thrombophilia
- Orphanet: Factor V Leiden mutation
- OMIM (Online Mendelian Inheritance in Man): Coagulation Factor V Leiden
Posted Sep 1, 2017 by Stacy 2650
Posted Dec 28, 2017 by Barbara 4050
