The authors of previous studies reported that the cumulative risk of PD by the age of 59 years ranges from 13–45%,29, 31 and from 21–85% at 69 years.30, 31 The range was widest at 79 years, with estimates from 32%32 to 100%.5, 31, Figure 3 shows the intermediate values from the consortium data; for example, a person who inherits LRRK2 Gly2019Ser has a 28% risk of PD at 59 years, 51% at 69 years, and 74% at 79 years. Here, LRRK2 is linked to Parkinson disease.