Table 1

Comparison of demographic characteristics between the group of patients (n=79) with an ALS diagnosis and the group of patients (n=11) with a PLS diagnosis or a distinct phenotype (upper motor neuron predominant ALS, monomelic ALS)

	Group	Median	Mean	SD	Min	Max
Age of disease onset (years)	Slower variant ALS	60.5	61.3	10.5	43.6	80.3
Age of disease onset (years)	ALS	62.7	62.2	11.1	37.5	86
Years from disease onset to baseline	Slower ariant ALS	2.3	3.4	3.4	0.4	11.3
Years from disease onset to baseline	ALS	0.5	1.0	1.1	0.1	5.5
ALSFRS total	Slower variant ALS	34	34.4	7.9	21	45
ALSFRS total	ALS	34	32.8	8.2	14	46

ALS, amyotrophic lateral sclerosis; PLS, primary lateral sclerosis.