Table 2.

Components of PSQI (n=111)

Subjective sleep quality
	Very good	6 (5.4)
	Fairly good	32 (28.8)
	Fairly bad	60 (54.1)
	Very bad	13 (11.7)
Sleep latency (min)
	≤15	36 (32.4)
	16–30	49 (44.1)
	31–60	23 (20.7)
	>60	3 (2.7)
Sleep duration (hours)
	>7	72 (64.9)
	6–7	20 (18.0)
	5–6	19 (17.1)
	<5	0 (0.0)
Sleep efficiency (%)
	>85	107 (96.4)
	75–84	4 (3.6)
	65–74	0 (0.0)
	<65	0 (0.0)
Sleep disturbances score (greater score indicates more frequent sleep disturbances)
	0	9 (8.1)
	1	87 (78.4)
	2	12 (10.8)
	3	3 (2.7)
Use of sleep medication
	Not during the past month	100 (90.1)
	Less than once a week	7 (6.3)
	Once or twice a week	2 (1.8)
	Three or more times a week	2 (1.8)
Daytime dysfunction score (higher score indicates greater daytime dysfunction)
	0	11 (9.9)
	1	83 (74.8)
	2	15 (13.5)
	3	2 (1.8)

PSQI, Pittsburgh Sleep Quality Index.