Mortality Risk Prediction in Amyopathic Dermatomyositis Associated With Interstitial Lung Disease: The FLAIR Model.

Area of Science:

• Pulmonology
• Rheumatology
• Medical Diagnostics

Background:

• Amyopathic dermatomyositis-associated interstitial lung disease (ADM-ILD) carries a poor prognosis.
• There is a critical need for a validated mortality risk score to guide clinical management and treatment strategies for ADM-ILD patients.

Purpose of the Study:

• To develop and validate a risk score model for predicting survival in patients diagnosed with ADM-ILD.
• To identify independent prognostic risk factors for mortality in ADM-ILD.

Main Methods:

• A prospective inception cohort of 207 ADM-ILD patients was studied.
• A multivariable Cox proportional hazards model identified prognostic factors, leading to the creation of the FLAIR risk score.
• The model's accuracy was assessed using the Brier score and validated in an independent patient cohort.

Main Results:

• The FLAIR score incorporates ferritin, LDH, anti-MDA5 antibody levels, CT imaging score, and rapidly progressive ILD (RPILD).
• Patients were categorized into low (0-4), medium (5-9), and high (10-13) risk groups based on their FLAIR score.
• High-risk patients demonstrated significantly higher mortality rates compared to low- and medium-risk groups in both discovery and validation cohorts (P < .001).

Conclusions:

• The developed FLAIR risk score effectively predicts survival in patients with ADM-ILD.
• This risk stratification tool can guide clinical research and inform risk-based treatment strategies for ADM-ILD.