Frequency of symptoms present at any severity (i.e., DRS-R98 scores ≥1 (A)) and at least moderate severity (DRS-R98 scores ≥2 (B)) for 400 elderly subjects by diagnostic group: delirium, subsyndromal delirium (SSD), dementia-only, and no-delirium/no-dementia (NDND). Pairwise comparisons between groups with chi-square, P values at <.0083 according to the Bonferroni correction. Color-coded squares above bars indicate other groups for which the labeled group was statistically different on that DRS-R98 item. Abbreviation: DRS-R98, Delirium Rating Scale-Revised-98.