. Author manuscript; available in PMC: 2010 Apr 1.

Published in final edited form as: J Affect Disord. 2008 Aug 15;114(1-3):41–49. doi: 10.1016/j.jad.2008.06.028

Table 2.

Sleep Functioning Parameters across Short Sleepers (SS), Normal Sleepers (NS), Long Sleepers (LS), and Across the Total Sample

Characteristic	df	Statistic	p	SS (n = 641)	NS (n = 760)	LS (n = 467)	Total Sample (n = 2,024)
Total Sleep Time (TST)	2	F = 3,456.95	<.001^a,^b,^c	4.64 (1.11)	7.24 (0.54)	10.59 (1.83)	7.28 (2.48)
Minimum Sleep	2	F=1,041.77	<.001^a,^b,^c	3.45 (1.52)	6.00 (1.49)	8.63 (2.68)	5.90 (2.68)
Maximum Sleep	2	F=1,636.64	<.001^a,^b,^c	5.83 (1.57)	8.49 (1.52)	12.56 (2.81)	8.66 (3.12)
Sleep Variability	2	F=44.77	<.001^b,^c	2.39 (2.13)	2.50 (2.79)	3.95 (4.07)	2.78 (3.02)

Note: Values are displayed as hours of sleep. Means are displayed with standard deviations in parentheses.

p <.05 for pairwise comparison of SS and NS.

p <.05 for pairwise comparison of SS and LS.

p <.05 for pairwise comparison of NS and LS.