RS of very elderly patients with DLBCL in The Netherlands according to period of diagnosis and age at diagnosis from 1989 to 2015. RS rates (RSRs) are shown for the following age categories: 80 to 84 (A), 85 to 89 (B), and ≥90 years (C). The tables present the projected 1-, 3-, and 5-year RSRs with 95% confidence intervals (CIs) according to period of diagnosis. Additionally, the OS in the patient cohort and the expected survival of an equivalent group from the general population, matched to the patients with respect to age, sex, and period, are plotted in supplemental Figure 2 to provide readers an enhanced understanding of the dynamics of RS. *P value for likelihood ratio test assessing linear trends from the period of 1989 to 2002 to the period of 2008 to 2015.