[Risk Factors of Respiratory Failure in the Dermatomyositis Patients with Interstitial Lung Disease]

Area of Science:

• Rheumatology
• Pulmonology
• Internal Medicine

Background:

• Dermatomyositis (DM) is an idiopathic inflammatory myopathy.
• Interstitial lung disease (ILD) is a common complication of DM.
• Respiratory failure (RF) significantly impacts prognosis in DM-ILD patients.

Purpose of the Study:

• To identify clinical features of respiratory failure (RF) in dermatomyositis (DM) patients with interstitial lung disease (ILD).
• To explore independent risk factors associated with the development of RF in this patient population.

Main Methods:

• Retrospective review of medical data from 122 DM patients with ILD.
• Comparison of clinical, laboratory, and radiological variables between patients with and without RF.
• Multivariate logistic regression analysis to determine independent risk factors for RF.

Main Results:

• Respiratory failure (RF) developed in 40 out of 122 DM-ILD patients, often within two years of DM onset.
• Significant associations with RF included older DM onset age, clinically amyopathic dermatomyositis (CADM), pneumomediastinum, elevated AST, LDH, and ground-glass opacities.
• Independent risk factors for RF were older DM onset age (OR=1.791), higher AST (OR=1.937), CADM diagnosis (OR=3.881), and ground-glass opacities (OR=4.187).

Conclusions:

• Respiratory failure is a critical complication of DM-ILD, frequently occurring within the first two years post-diagnosis.
• Older age at DM onset, CADM, elevated AST levels, and the presence of ground-glass opacities on imaging are significant risk factors for RF development.
• Early identification of these risk factors can aid in timely intervention and management of DM-ILD patients at high risk for respiratory compromise.