Skip to main content

View full-text article in PMC

. Author manuscript; available in PMC: 2008 Apr 1.

Published in final edited form as: J Pain Symptom Manage. 2007 Apr;33(4):398–409. doi: 10.1016/j.jpainsymman.2006.09.022

Table 6.

Correlations Between Subjective Sleep and Fatigue (n=130)

Variable	Fatigue^a
Sleep	Total Score	Behavioral/Severity	Sensory	Cognitive/mood	Affective meaning
Total Score^b	0.36^d	0.35^d	0.26^e	0.30^d	0.37^d
Subjective sleep quality ^c	0.31^d	0.25^e	0.31^e	0.31^d	0.28^d
Sleep latency ^c	0.24^e	0.24^e	NS	0.18^f	0.28^d
Sleep duration ^c	NS	NS	NS	NS	NS
Habitual sleep efficiency ^c	NS	NS	NS	NS	NS
Sleep disturbances ^c	0.28^e	0.29^e	0.20^f	0.24^e	0.25^e
Use of sleeping medication ^c	0.25^e	0.25^e	NS	0.22^e	0.27^e
Daytime dysfunction ^c	0.42^d	0.38^d	0.34^d	0.42^d	0.37^d

NS = not significant.

^a

Fatigue measured by Piper Fatigue Scale (PFS).

^b

Sleep measured by Pittsburgh Sleep Quality Index (PSQI).

^c

Components of the PSQI.

^d

P<0.001.

^e

P <0.01.

^f

P<0.05.