Real-world data on the course of idiopathic pulmonary fibrosis.

Idiopathic pulmonary fibrosis (IPF) is characterized by a progressive decline in lung function, worsening quality of life, and high mortality. However, the rate and pattern of progression of IPF are variable. Real-world studies, which include a broader population of patients than clinical trials and collect data over longer periods, have provided important information on the clinical course of IPF and further insights into the efficacy and safety of antifibrotic therapies. They also highlight the worsening of patients' quality of life as lung function is lost, the high frequency of hospitalizations, and the impact of acute exacerbations on mortality in patients with IPF. Data from patient registries and analyses of claims data suggest that antifibrotic therapy is more likely to be used in patients who have worse lung function and that its use is associated with an improvement in life expectancy. The safety profile of antifibrotic therapies in real-world populations is consistent with that observed in clinical trials. Further real-world studies are needed to improve understanding of the course and impact of IPF in specific groups of patients and how the care provided to these patients might be improved.