Black Americans live longer, not necessarily better, with ALS

Blacks people live longer, not necessarily better, with ALS - UPI.com

In 'my' study, African Americans are far less likely to develop Amyotrophic Lateral Sclerosis than other 'three' ethnic groups . . . are they actually less vulnerable or is there some other reason they are less likely to show up in statistics . . . the implications of the report reference here would be they ought to be more likely to be discovered . . . ?