Characteristics of the subjects within each latent class.

Values show means (SD) and counts (%). This table demonstrates how variables that we have traditionally used to sub-divide and study ALS associate with the groups generated in this study. While not showing significant differences, we can see trends suggesting that age of onset is associated with speed of progression. There are some sex ratio differences, particularly between Classes 1 and 2. However, strikingly, there is no clear split with the traditionally used phenotypes.