Abstract
Introduction/objectives
Birmingham vasculitis activity score (BVAS) version 3 (BVAS 3.0) and BVAS/granulomatosis with polyangiitis (BVAS/GPA) are used as indicators of disease activity in anti-neutrophil cytoplasmic antibody-associated vasculitis. We evaluated the association between these indices and the significance in patients with GPA and microscopic polyangiitis (GPA/MPA).
Methods
We retrospectively reviewed the records of 203 patients with GPA/MPA in our hospital. The correlation between BVAS 3.0 and BVAS/GPA with the five-factor score (FFS) and laboratory data was investigated. The episodes of all-cause mortality, end-stage renal disease, and disease relapse were counted as adverse clinical outcomes. Multivariate Cox hazard analyses were performed to assess the relationships between both indices and patient outcomes.
Results
Sixty-five (32.0%) and 138 (68.0%) patients with GPA and MPA were included. The median BVAS 3.0 was significantly higher in patients with MPA than in those with GPA (13.0 vs. 11.0, p = 0.015), whereas BVAS/GPA was higher in patients with GPA (4.0 vs. 3.0, p = 0.001). BVAS 3.0 and BVAS/GPA correlated significantly (r = 0.670, p < 0.001); both BVAS 3.0 and BVAS/GPA were shown to be associated with the outcomes investigated in separate Cox models. However, the correlation between BVAS 3.0 and BVAS/GPA was especially higher in a subgroup of patients with MPA than in those with GPA (MPA: r = 0.817, p < 0.001 vs. GPA: r = 0.570, p < 0.001) and with renal involvement (r = 0.676, p < 0.001).
Conclusions
Although both BVAS 3.0 and BVAS/GPA significantly correlated and predicted outcomes well in those with GPA/MPA, a discord was observed based on disease subtypes and organ involvement.
Key Points • BVAS 3.0 and BVAS/GPA significantly correlated and predicted outcomes in those with GPA/MPA. • A discordance was also observed based on disease subtypes and organ involvement. |
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Data availability
The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
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Funding
This research was supported by 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 (HI14C1324), the Handok Inc., Seoul, Republic of Korea (HANDOK 2021-006), and CELLTRION PHARM, Inc. Chungcheongbuk-do, Republic of Korea (NCR 2019-6).
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Conceptualisation, S.S.A. and S-W.L.; methodology, S.S.A. and J.W.H.; software, S.S.A.; validation, S.S.A. and J.W.H.; formal analysis, S.S.A. and J.W.H.; investigation, S.S.A.; resources, S.S.A., J.W.H., Y-B.P., and S-W.L.; data curation, S.S.A. and J.W.H.; writing—original draft preparation, S.S.A. and J.W.H.; writing—review and editing, S.S.A., J.W.H., Y-B.P., and S-W.L.; visualisation, S.S.A. and J.W.H.; supervision, Y-B.P. and S-W.L.; project administration, S.S.A., J.W.H., and S-W.L. All authors have read and agreed to the published version of the manuscript.
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Supplementary Fig. 1
Flowchart describing the inclusion and exclusion of patients. Among the 258 patients with the diagnosis of GPA/MPA searched through the hospital’s electronic medical review system, a total of 55 patients were excluded, reaching the number of 203. GPA/MPA: Granulomatosis with polyangiitis and microscopic polyangiitis; ACR: American College of Rheumatology; EMA: European Medicines Agency; CHCC: Chapel Hill Consensus Conference; BVAS: Birmingham vasculitis activity score; FFS: Five-factor score. (PNG 117 kb)
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Ahn, S.S., Ha, J.W., Park, YB. et al. BVAS version 3 and BVAS/GPA: standing on the same line?. Clin Rheumatol 41, 3429–3437 (2022). https://doi.org/10.1007/s10067-022-06267-z
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DOI: https://doi.org/10.1007/s10067-022-06267-z