Table 1.

Summary of targeted DNA sequencing screen.

Group	Number of patients	Number with a newly identified variant	Number with >1 newly identified variant	Average age of onset (standard deviation) (years)	Male:Female Ratio
Familial ALS	42	16	1	60 (8.6)	1.5:1
Young sporadic ALS	61	26	5	41 (15.8)	1.9:1
Total	103	42	6	49 (15.2)	1.8:1