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Novel mortality-predicting index at diagnosis can effectively predict all-cause mortality in patients with antineutrophil cytoplasmic antibody-associated vasculitis

Authors
 Hyunsue Do  ;  Jason Jungsik Song  ;  Yong-Beom Park  ;  Sang-Won Lee 
Citation
 JOURNAL OF CLINICAL LABORATORY ANALYSIS, Vol.35(8) : e23885, 2021-08 
Journal Title
JOURNAL OF CLINICAL LABORATORY ANALYSIS
ISSN
 0887-8013 
Issue Date
2021-08
Keywords
Mortality-predicting index ; all-cause mortality ; antineutrophil cytoplasmic antibody ; inflammation prognostic index ; vasculitis
Abstract
Background: This study investigated whether the inflammation prognostic index (IPI) and the mortality predicting index (MPI) at diagnosis could predict all-cause mortality in patients with antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV).

Methods: We included 223 AAV patients and reviewed their medical records. Clinical and laboratory data and AAV-specific indices at diagnosis were assessed. The IPI was calculated as neutrophil-to-lymphocyte ratio (NLR) × C-reactive protein to albumin ratio (CAR). Here, we newly developed an MPI (NLR × CAR × monocyte counts).

Results: The mean age of 223 patients (122 MPA, 57 GPA and 44 EGPA patients) was 59 years. The rate of mortality was 11.2%. Using the receiver operator characteristic curve for all-cause mortality, the cut-offs were calculated as NLR: 3.22, CAR: 3.25, IPI: 18.53 and MPI: 8367.82. In the univariable Cox hazard analysis, age, gender, smoking history, BVAS, FFS and over the cut-off of each index showed statistical significance. As the indices share at least two mutual variables, the multivariable analysis was conducted four times based on each index. An IPI ≥18.53 (HR 3.162) and MPI ≥8367.82 (HR 3.356) were significantly associated with all-cause mortality.

Conclusions: This study developed a novel indicator, MPI, that uses the existing NLR and CAR indices and proved that it could predict all-cause mortality in AAV patients.
Files in This Item:
T202103566.pdf Download
DOI
10.1002/jcla.23885
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Do, Hyunsue(도현수)
Park, Yong Beom(박용범)
Song, Jason Jungsik(송정식) ORCID logo https://orcid.org/0000-0003-0662-7704
Lee, Sang-Won(이상원) ORCID logo https://orcid.org/0000-0002-8038-3341
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/184752
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