Methods

Data were analyzed from patients who:
- Had been enrolled in the IPF-PRO Registry between 5 June 2014 and 11 March 2019
- Had not been diagnosed with IPF prior to referral but received a new diagnosis of IPF at the enrolling center
- Had a documented date in their medical records for symptom onset and/or HRCT scan showing pulmonary fibrosis.
Patients were categorized as having a longer (>1 year) or shorter (≤1 year) time from symptom onset, and from first imaging evidence of pulmonary fibrosis, to diagnosis of IPF.
Patient characteristics at enrollment, and time from enrollment to death or lung transplant, were compared between patients with longer (>1 year) versus shorter (≤1 year) times to diagnosis of IPF.