Table 1.

Participant Demographic and Psychiatric Characteristics (N = 58)

	8h TIB		6h TIB
			Late Bedtime		Early Risetime
	(n = 16)		(n = 20)		(n = 22)
	n	%	n	%	n	%
Sex, % female	16	1.6	14.5	1.7	14.5	1.5
	M	SD	M	SD	M	SD
Age (years)	26.9	8	24.7	6.1	26.1	7.2
Education (years)*	16	1.6	14.0*	1.7	14.6*	1.5
Baseline depression severity (QIDS-SR)	12.4	3.0	12.4	4.1	14.2	4.2
Length of current depressive episode (months)	10.7	8.1	16.1	23.9	10.1	8.8

Note. QIDS-SR indicates the 16-item Quick Inventory of Depressive Symptomatology-Self-Report. Post-hoc comparisons indicated 8h TIB > both Late Bedtime and Early Risetime.

^*p < .05.