Fibrinogen to albumin ratio reflects the activity of antineutrophil cytoplasmic antibody-associated vasculitis

Lucy Eunju Lee, Jung Yoon Pyo, Sung Soo Ahn, Jason Jungsik Song, Yong Beom Park, Sang Won Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Background: We investigated whether fibrinogen to albumin ratio (FAR) at diagnosis could reflect the cross-sectional activity and predict poor outcomes in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). Methods: This cross-sectional study included 54 immunosuppressant drug-naïve patients with AAV who had the results of plasma fibrinogen and serum albumin at diagnosis. Clinical and laboratory data at diagnosis were collected, and all-cause mortality, cerebrovascular accident, cardiovascular disease, end-stage renal disease occurrences were assessed as poor outcomes. FAR was calculated by the following equation: FAR = plasma fibrinogen (g/dl)/serum albumin (g/dl). Results: The median age was 65.5 years, and 59.3% of patients were men (33 MPA, 13 GPA and 8 EGPA). FAR was significantly correlated with Birmingham vasculitis activity score (BVAS; r = 0.271), erythrocyte sedimentation rate (ESR; r = 0.668) and C-reactive protein (CRP; r = 0.638). High BVAS was defined as BVAS ≥16, and the cut-off of FAR at diagnosis was set as 0.118. AAV patients with FAR at diagnosis ≥0.118 had a significantly higher risk for the cross-sectional high BVAS than those without (RR 3.361). In the univariable linear regression analysis, CRP (β = 0.383) and FAR (β = 0.297) were significantly correlated with BVAS at diagnosis. However, in the multivariable analysis, none of them was correlated with the cross-sectional BVAS. FAR at diagnosis could not predict poor outcomes during follow-up in AAV patients. Conclusions: Fibrinogen to albumin ratio at diagnosis could reflect the cross-sectional BVAS but could not predict poor outcomes in patients with AAV.

Original languageEnglish
Article numbere23731
JournalJournal of Clinical Laboratory Analysis
Volume35
Issue number4
DOIs
Publication statusPublished - 2021 Apr

Bibliographical note

Funding Information:
This research was supported by a faculty research grant of Yonsei University College of Medicine (6‐2019‐0184) and a grant from the Korea Health Technology R&D Project through the Korea Health Industry Development Institute, funded by the Ministry of Health and Welfare, Republic of Korea (HI14C1324).

Publisher Copyright:
© 2021 The Authors. Journal of Clinical Laboratory Analysis published by Wiley Periodicals LLC

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Hematology
  • Public Health, Environmental and Occupational Health
  • Clinical Biochemistry
  • Medical Laboratory Technology
  • Biochemistry, medical
  • Microbiology (medical)

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