Table 2. Pittsburgh Sleep Quality Index (PSQI) sub-scales.

	Pre-discharge, mean (s.d.)	Post-discharge, mean (s.d.)
	n = 33*	n = 28**
Global score	7.50 (3.53)	6.35 (4.61)
Sleep quality	0.94 (0.72)	0.82 (0.86)
Sleep latency	1.61 (1.03)	1.39 (0.92)
Sleep duration	1.21 (1.08)	0.71 (0.98)
Sleep efficiency	0.73 (1.10)	0.61 (0.88)
Sleep disturbance	1.50 (0.67)	1.33 (0.62)
Sleep medication	0.61 (1.20)	0.81 (1.27)
Daytime sleep dysfunction	0.85 (0.62)	0.59 (0.69)

PSQI raw global scale range: 0–21; sub-score scale range: 0–3

*Sleep disturbance & global score pre-discharge; n = 32

**Sleep disturbance, sleep medication, daytime sleep dysfunction, & global score post-discharge, n = 27