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Serum IgA levels for predicting the development of rapidly progressive interstitial lung disease in dermatomyositis

Haoru Zhang1, Renge Liang2, Xin Yuan1

  • 1Department of Rheumatology and Immunology, Nanfang Hospital, Southern Medical University, Guangzhou, China.

Respiratory Medicine
|June 11, 2023
PubMed
Abstract

Insights

High serum IgA levels are a key predictor of rapidly progressive interstitial lung disease (RPILD) in dermatomyositis (DM) patients. This finding helps identify individuals at higher risk for this severe complication.

Area of Science:

  • Rheumatology
  • Pulmonology
  • Immunology

Background:

  • Dermatomyositis (DM) patients can develop life-threatening, treatment-resistant rapidly progressive interstitial lung disease (RPILD).
  • Predictive factors for RPILD in DM are currently lacking, hindering early intervention.
  • Identifying reliable risk factors is crucial for managing DM-associated RPILD.

Purpose of the Study:

  • To identify independent risk factors for the development of RPILD in patients with DM.
  • To establish a practical predictive model for RPILD in DM.

Main Methods:

  • Retrospective review of 71 DM patients admitted between July 2018 and July 2022.
  • Univariate and multivariate regression analyses were performed to identify risk factors.
  • A risk model was established using significant predictors.

Main Results:

  • Serum IgA levels were identified as a significant independent risk factor for RPILD in DM.
  • A predictive model combining IgA levels, anti-MDA5 antibody, fever, and C-reactive protein achieved an area under the curve of 0.935 (P < 0.001).

Conclusions:

  • Elevated serum IgA levels are an independent risk factor for RPILD in DM patients.
  • The developed risk model demonstrates high predictive accuracy for RPILD in DM.
Keywords:
DermatomyositisIgAMDA5Rapidly progressive interstitial lung diseaseRisk model

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