Derivation and validation of a prediction model for histopathologic fibrotic hypersensitivity pneumonitis

Clinical differentiation of fibrotic hypersensitivity pneumonitis (f-HP) remains challenging given variable and overlapping presentations with other fibrotic interstitial lung disease (f-ILD).We derived a multivariable model for predicting histopathologic f-HP to better inform multidisciplinary team discussion (MDD) diagnosis, particularly when biopsy may be unsafe or cannot be achieved.Patients with histopathologically-defined f-HP and other...