Table 1.

Demographic profile, motor signs, and family history across groups^a

Abbreviations: ALS = amyotrophic lateral sclerosis; bvFTD = behavioral variant of frontotemporal dementia; C9+ = C9ORF72 mutation carriers; FHx = family history; FTD-MND = frontotemporal dementia–motor neuron disease.

^aDemographic information, family history, and motor signs at first evaluation. Years displayed as least squares means ± standard error (range).

^bp ≤ 0.01.