Table 1.

Characteristics of study patients hospitalized in internal medicine department

Variables		No. of patients (n=103)
Age, mean (SD)	60.0 (14.8)
Gender	Male	59 (57.2)
	Female	44 (42.8)
Severity of diseasea	1 (least severe)	18 (17.5)
	2	79 (76.7)
	3 (most severe)	6 (5.8)
Medication of sleep interfering drugb	No	35 (34.0)
	Yes	68 (66.0)
Type of hospital rooms (bed)	1 (n=2)	2 (1.9)
	2 (n=1)	1 (1.0)
	4 (n=12)	37 (35.9)
	6 (n=14)	63 (61.2)

Values are presented as number (%).

^aFrom Ministry of Health and Welfare. Guidelines for hospital evaluation program 2006 [13].

^bFrom Dankook University Hospital. 2009 drug formulary [14].