Table 4. Case-crossover analysis.

	Univariate analysis for fall OR (95%CI, P value)	Multivariate analysis for fall OR (95%CI, P value)
Suvorexant	1.84 (1.10–3.07, 0.019)	1.78 (1.05–3.00, 0.031)
Ramelteon	1.14 (0.54–2.33, 0.707)	1.19 (0.55–2.46, 0.640)
Non-benzodiazepines	1.60 (1.16–2.20, 0.004)	1.63 (1.17–2.27, 0.004)
Benzodiazepines	1.13 (0.84–1.51, 0.419)	1.09 (0.79–1.50, 0.585)
Kampo (yokukansan)	1.55 (0.83–2.85, 0.159)	1.46 (0.75–2.68, 0.277)

Multiple logistic regression adjusted age, sex, hospitalized department, the fall down risk score and all sleep medications.

OR: odds ratio, CI: confidence interval.