Public Service Announcement About Stroke

There is a very compelling, stirring public service announcement on the radio about the dangers of stroke, and how it disproportionately affects the African-American population.  As a matter of fact, as the announcement reports, it affects this demographic group at twice the rate of the general population.  So there is a very legitimate concern here that needs addressing.  And the way the announcement was produced, with a speech-impaired stroke victim describing his plight, made a big impact on me.  Yes, this was one of the best-done PSAs I've heard.  But I have a qualm with one claim made on it.

The announcer, immediately following the stroke victim's words, stated that the odds were that he was black, since this affliction affects that group at twice the rate, as I have stated.  But wait, blacks are only 13% of the general population, so at even only half the stroke rate of the African-Americans, the "others" with strokes would still easily outnumber them.  So the odds WOULDN'T be that the stroke victim was black.  But the point that WAS validly being pressed was that, if you belong to this high-risk group, then you need to be especially careful about both getting medical screens to detect any stroke warning signs as well as engage in a more healthful lifestyle.  But then again, this applies to EVERYONE, not just one group with a higher prevalence of stroke...