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Short-term lung function changes predict mortality in patients with fibrotic hypersensitivity pneumonitis
Claudio Macaluso1,2, Cristina Boccabella1,3, Maria Kokosi1
1Interstitial Lung Disease Unit, Royal Brompton and Harefield Clinical Group, Guy's and St Thomas' NHS Foundation Trust, London, UK.
Respirology (Carlton, Vic.)
|January 13, 2022
Summary
Short-term lung function decline in fibrotic hypersensitivity pneumonitis (fHP) predicts mortality. A 5% drop in forced vital capacity (FVC) or 10% in diffusion capacity (DLCO) significantly reduces survival in fHP patients.
Area of Science:
- Pulmonary Medicine
- Respiratory Diseases
- Immunology
Background:
- Fibrotic hypersensitivity pneumonitis (fHP) can progress despite treatment.
- Predictors of mortality in fHP remain poorly understood.
- Investigating short-term lung function changes is crucial for risk stratification.
Purpose of the Study:
- To determine if short-term changes in lung function predict mortality in fHP.
- To identify specific thresholds of lung function decline associated with reduced survival.
Main Methods:
- Retrospective analysis of 145 fHP patients.
- Collected baseline and 1-year follow-up data on lung function (FVC, DLCO), echocardiography, and BAL cellularity.
- Used Cox proportional hazards analysis to assess mortality predictors.
Main Results:
- A decline in FVC ≥5% or DLCO ≥10% at 1 year was strongly associated with reduced survival.
- Multivariable analysis confirmed these findings after adjusting for clinical factors.
- Baseline factors like FVC severity, age, honeycombing on CT, and PASP ≥40 mmHg also predicted mortality.
Conclusions:
- Short-term worsening of FVC and DLCO are significant predictors of mortality in fHP.
- These lung function changes can aid in identifying high-risk patients for closer monitoring and intervention.
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