Radiological and Physiological Predictors of IPF Mortality

Area of Science:

• Pulmonology
• Radiology
• Medical Statistics

Background:

• Idiopathic pulmonary fibrosis (IPF) presents a variable clinical course, from asymptomatic cases to progressive respiratory failure.
• Anti-fibrotic agents are used to manage IPF, but novel predictors of mortality are needed.

Purpose of the Study:

• To evaluate novel clinical parameters for predicting mortality in IPF patients receiving anti-fibrotic therapy.

Main Methods:

• Retrospective analysis of 39 IPF patients (2011-2021) at Okinawa Chubu Hospital.
• Collected data included laboratory results, pulmonary function tests (PFTs), chest imaging (soft tissue thickness, HRCT patterns).
• Multivariate analysis adjusted for age was performed to identify mortality predictors.

Main Results:

• Soft tissue thickness at the right 9th rib (HR: 0.912, p=0.009) and percent predicted functional residual capacity (%FRC) (HR: 0.980, p=0.002) were significant predictors of IPF mortality.
• Median survival time was 32.4 months, with 24 deaths during the observation period.
• Common HRCT patterns included definite, probable, and indeterminate for usual interstitial pneumonia (UIP).

Conclusions:

• Soft tissue thickness on chest radiographs and %FRC are novel, robust predictors of mortality in IPF patients treated with anti-fibrotic agents.
• These parameters can aid in risk stratification and management of IPF.
• Further research is warranted to validate these findings in larger cohorts.