New Study Reveals Higher-Than-Expected Prevalence of Factor VII Deficiency – RPTH Journal
RPTH Journal shared a post on LinkedIn about a recent article by Lukas Löwing Svensson et al, adding:
“Factor VII Deficiency Is Far More Common Than We Thought
A new population-based study from Sweden challenges long-held assumptions about the rarity of congenital factor VII (FVII) deficiency. By systematically analyzing laboratory data and clinical records across a defined adult population, the authors report:
- FVII deficiency prevalence: ~1 in 17,800 adults
- Low FVII levels: ~1 in 9,600 adults
- Combined prevalence: ~1 in 6,200
- 43% of FVII-deficient individuals experienced spontaneous bleeding, including major bleeds
This is ~28-fold higher than the traditionally cited prevalence of 1 in 500,000.
The study highlights how reliance on registries and referral-based diagnoses likely leads to substantial under-ascertainment of rare bleeding disorders. Mild or asymptomatic cases are being missed — with real implications for perioperative care, anticoagulation decisions, and bleeding risk assessment.
A strong reminder that:
- ‘Rare’ does not always mean uncommon
- Systematic laboratory-based approaches matter for true disease epidemiology”
Title: Factor VII deficiency is more prevalent than previously reported
Authors: Lukas Löwing Svensson, Elisabeth Aardal, Margareta Holmström
Read the Full Article on RPTH Journal
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