Table 2.

Sleep diary and actigraphy data for weekend and school nights.

	School Nights (n = 69)				Weekend Nights (n = 66)				Weekend – School Nights (n = 66)
	Min	Max	Mean	SD	Min	Max	Mean	SD	Min	Max	Mean	SD	t	P
Sleep diary
Bedtime, 24-hour clock	19:03	22:39	20:15	0:40	19:00	23:45	21:03	0:57	−1:12	3:07	0:47	0:47	8.163	<.001
Wake time, 24-hour clock	6:06	8:15	7:06	0:33	6:03	10:30	7:33	0:53	−0:53	2:38	0:26	0:39	5.515	<.001
Sleep period, hours:minutes	8:53	12:27	10:50	0:32	7:41	13:10	10:30	1:00	−2:28	1:48	−0:19	0:53	−2.990	.004
Actigraphy
Sleep start time, 24-hour clock	19:28	23:02	20:47	0:42	19:35	23:35	21:38	0:54	−0:37	2:28	0:52	0:45	9.219	<.001
Sleep end time, 24-hour clock	5:36	8:13	6:50	0:34	5:18	10:02	7:08	0:52	−0:54	2:19	0:18	0:38	3.870	<.001
Sleep period, hours:minutes	8:41	10:58	9:58	0:29	7:18	11:46	9:23	0:46	−3:31	1:12	−0:36	0:48	−6.019	<.001
Sleep period efficiency, %	63	90	79.61	5.30	67	93	81.14	6.02	−8	14	1.43	4.98	2.281	.026

Paired-samples t tests were used to examine differences between school-night and weekend sleep data. Max = maximum; Min = minimum.