Fig. 3

Age of the HAM-net subjects analyzed in this study. This graph illustrates the marked delay between age of onset (n = 381) and age at diagnosis (n = 383) for HAM/TSP patients and shows that HAM-net subjects have mostly been suffering from the disease for many years before registering. The most common age of onset was during the subjects’ 40s, but they were primarily diagnosed in their 50s. Nearly 40 % of HAM-net subjects are currently in their 60s, the largest HAM-net age demographic