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New Study Reveals Higher-Than-Expected Prevalence of Factor VII Deficiency – RPTH Journal
RPTH Journal /LinkedIn
Feb 7, 2026, 15:58

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

New Study Reveals Higher-Than-Expected Prevalence of Factor VII Deficiency - RPTH Journal

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Elisabeth Aardal Factor VII Deficiency Health Hematology Hemostasis Hemostasis News Hemostasis Today Lukas Löwing Svensson Margareta Holmström Medicine Rare Bleeding Disorder RPTH Journal thrombosis
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