Table 1.

Patient characteristics (N = 113)

	Delirium (n = 49)	No delirium (n = 64)	P-value
Age (years), mean (SD)	80.76 (11.90)	81.81 (8.25)	0.60‡
Male sex, n (%)	28 (57)	34 (53)	0.81*
Charlson comorbidity index, mean (SD)	3.14 (2.02)	2.92 (2.35)	0.59‡
Karnofsky Performance Status, mean (SD)	39.59 (20.61)	48.44 (25.02)	0.04‡
Number of drugs, mean (SD)	7.04 (3.26)	6.14 (3.95)	0.19‡
Number of drugs with psychotropics, mean (SD)	10.02 (3.78)	8.66 (4.11)	0.07‡
Psychotropics use, n (%)
Antipsychotics	33 (67)	39 (61)	0.61*
Benzodiazepine or Z-drugs	12 (24)	13 (20)	0.76*
Ramelteon or suvorexant	41 (84)	55 (86)	0.95*
Antidepressant	3 (6)	2 (3)	0.65†
Other drugs	19 (39)	18 (28)	0.32*

Other drugs included anti-dementia drugs, valproic acid, Yokukansan

^*, Chi-squared test; ^†, Fisher’s exact test; ^‡, Student’s t-test