Fig. 2

survival after diagnosis in 409 patients with IPF, stratified by time to diagnosis > 24 months or ≤ 24 months. median survival after diagnosis was 1012 days in patients with time to diagnosis > 24 months (interquartile range (IQR) 530–1863), compared to 1322 days in patients with time to diagnosis ≤ 24 months (IQR 610–2476) (p = 0.05). In a multivariate model that corrected for diffusion capacity of the lung for carbon monoxide, forced vital capacity, sex, and age at diagnosis, time to diagnosis did not associate with survival (hazard ratio 1.051 (95% confidence interval 0.800–1.380; p = 0.72)). At risk tables represent the number of patients at the start of every year during follow up