Figure 1. Survival status of diagnosis subgroups of patients at 6, 12, and 18 months after enrollment.

Diagnoses of C9orf72 mutation carriers are represented by colors (red, ALS; green, ALS-FTD; blue, bvFTD). The portion of surviving patients of those enrolled at each interval is shown in color; gray represents nonsurvivors. ALS = amyotrophic lateral sclerosis; bvFTD = behavior-variant frontotemporal dementia; FTD = frontotemporal dementia.