Brain stuff is influenced by genetic makeup as much as any other health condition. Many health conditions present with different effect or prevalence in different racial sub-populations or between the sexes.<p>It&#x27;s meaningful to include race if it was a factor, because she&#x27;s saying it was a predominant trait in the study populations on which the diagnostic criteria were originally built.<p>If you don&#x27;t study an effect in different populations to determine the universality of your criteria, you could very well be under- or over-diagnosing persons from those groups.