Table 2.

Frequency distributions of sleep quality and sleep disturbance scores as measured by components of the PSQI

Component	Question/ Component Scores	0	1	2	3
1	Rate overall quality of sleep	Very good	Fairly good	Fairly bad	Very bad
		16.8%	62.4%	18.8%	2%
2	How long does it take you to fall sleep	< 15 min	16–30 min	31–60 min	> 60 min
		42.0%	39.3%	13.3%	5.3%
3	Hours do you actually sleep	> 7 h	6 h	5 h	<  5 h
		30.6%	24.5%	29.3%	15.6%
4	% Time in bed sleeping	> 85%	75–84%	65–74%	< 65%
		60.4%	24.3%	10.4%	4.9%
5	Overall sleep disturbances score	0	1–9	10–18	19–27
		15.1%	84.9%	0%	0%
6	Taken medicine to aid in sleep?	Not in past month	< once a week	1–2 times a week	≥3 times a week
		64.4%	29.5%	6.2%	0%
7	Daytime dysfunction	0	1–2	3–4	5–6
		25.3%	71.9%	2.7%	0%