Table 1. Medication prescribed to cases and controls.

Medication	Cases n (%)	controls n (%)	P value
Suvorexant	30 (9.2)	20 (1.5)	<0.001
Ramelteon	13 (4.0)	22 (1.7)	0.017
Non-benzodiazepines	84 (25.8)	151 (11.6)	<0.001
Benzodiazepines	96 (29.5)	255 (19.7)	<0.001
Kampo (yokukansan)	21 (6.5)	26 (2.0)	<0.001
No sleep medication prescribed	144 (44.3)	879 (67.9)	<0.001
Total patients	325	1295

Non-benzodiazepines include: Zolpidem, Eszopiclone, Zopiclone.

Benzodiazepines include: Triazolam, Etizolam, Brotizolam, Rilmazafone, Alprazolam, Lorazepam, Quazepam, Flutoprazepam, Clotiazepam, Diazepam, Flunitrazepam, Nitrazepam, Clonazepam, Lormetazepam.

Variables are analyzed by Fisher's exact probability test.