Table 2.

Sleep variables from the actiwatch and self-report

Variable	CFS (n = 15)	Control (n = 15)	P-value
Actiwatch
Duration (h)	8.8 (0.8)	8.1 (0.9)	0.07
Sleep Efficiency (%)	79.9 (8.9)	83.6 (4.3)	0.21
Sleep Fragmentation (%)	19.7 (9.5)	18.6 (4.1)	0.72
Self-reported sleep quality
PSQI	7.7 (3.9)	3.5 (2.2)	0.002
Activity patterns
Total AC/day over 5 days	307613 (78621)	317414 (51220)	0.70
Average AC/min over 5 days	342 (94)	340 (48)	0.95
Peak AC	2360 (1349)	1881 (443)	0.21

Values are group means (standard deviations). PSQI, Pittsburg Sleep Quality Index; AC, activity counts.