“…In terms of affective symptom clusters in AD, Harwood et al [50] found greater ideational disturbance (suicide, self-deprecation, pessimism, and mood congruent delusions) and mood symptoms (anxiety, sadness, lack of reactivity to pleasant events, and irritability) among Hispanics compared with non-Hispanic whites. Further, Hispanic [37] and black [13,17,43,49,51] patients with dementia show greater rates of psychosis in comparison with whites, although the results have not been uniformly consistent [40,42,45]. Black and white ethnic differences have been negligible with respect to agitation [13,17,42,45], although one study found a higher intensity of difficult behaviors among Mexican-American patients with dementia relative to non-Hispanic whites [4].…”