Table 5.

DRS-R98 scores for the 243 patients with dementia according to diagnostic groups: full syndromal delirium (delirium), SSD, and dementia-only

DRS-R98	Dementia without delirium (n = 119)	Dementia with SSD (n = 63)	Dementia with delirium (n = 61)
1. Sleep-wake cycle disturbance∗†	0.67 ± 0.75	1.22 ± 0.73	1.51 ± 0.77
2. Perceptions and hallucinations∗†	0.24 ± 0.76	0.68 ± 1.15	0.49 ± 0.96
3. Delusions∗	0.24 ± 0.76	0.51 ± 0.91	0.33 ± 0.77
4. Lability of affect∗†	0.18 ± 0.43	0.44 ± 0.64	0.56 ± 0.67
5. Language∗†‡	0.18 ± 0.49	0.71 ± 0.85	1.21 ± 1.13
6. Thought process abnormalities∗†‡	0.19 ± 0.47	0.78 ± 0.77	1.33 ± 1.09
7. Motor agitation∗†	0.11 ± 0.34	0.67 ± 0.76	0.89 ± 0.88
8. Motor retardation∗†	0.13 ± 0.34	0.76 ± 0.80	1.16 ± 0.97
9. Orientation∗†‡	0.69 ± 0.84	1.33 ± 0.82	2.13 ± 0.76
10. Attention∗†‡	0.26 ± 0.49	1.41 ± 0.56	1.97 ± 0.73
11. Short-term memory†	1.06 ± 1.14	1.38 ± 1.21	1.72 ± 1.16
12. Long-term memory∗†‡	1.60 ± 1.09	2.29 ± 0.92	2.66 ± 0.75
13. Visuospatial ability∗†‡	0.71 ± 0.86	1.41 ± 0.85	2.05 ± 0.94
14. Temporal onset of symptoms∗†	0.22 ± 0.52	1.51 ± 0.67	1.54 ± 0.79
15. Fluctuation of symptom severity∗†	0.03 ± 0.18	0.51 ± 0.59	0.74 ± 0.60
16. Physical disorder∗†	0.43 ± 0.78	1.17 ± 0.87	1.39 ± 0.76
Severity scale∗†‡	6.28 ± 3.69	13.63 ± 5.56	18.05 ± 6.22
Total scale∗†‡	6.96 ± 4.13	16.79 ± 6.37	21.67 ± 7.17

Abbreviations: DRS-R98, Delirium Rating Scale-Revised-98; SSD, subsyndromal delirium.

NOTE. Values expressed as the means ± standard deviation. Comparisons made by Kruskal-Wallis analysis of variance, with Mann-Whitney U post hoc pairwise analysis. Significance at P < .0166 according to the Bonferroni correction.

^∗Dementia-only < SSD.

^†Dementia-only < delirium.

^‡SSD < delirium.