Delirium subgroup (n=12) | Dementia subgroup (n=12) | Pairwise group comparisons | |

Age (years): mean (SD) | 78.7 (8.6) | 81.1 (7.2) | (22)=0.75, p=0.46 |

MDAS: median (range) | 10.0 (7–17) | 5.5 (3–9) | K-W χ^{2}: U=3.0, p<0.001 |

MMSE: median (range) | 19.5 (15–22) | 19.0 (12–21) | K-W χ^{2}: U=69.0, p=0.89 |

Task 1: median (range) | 2.0 (0–5) | 4.5 (2–5) | K-W χ^{2}: U=21.5, p<0.01 |

Task 2: median (range) | 1.0 (0–3) | 4.5 (2–5) | K-W χ^{2}: U=4.5, p<0.001 |

K-W, Kruskal–Wallis; MDAS, Memorial Delirium Assessment Scale; MMSE, Mini-Mental State Examination.