Table 1.

Sleep means (SD) of experimental and control groups measured by actigraphy

Variable	Experimental Group				Control Group
	First Week		Second Week		First Week		Second Week
	X¯	SD	X¯	SD	X¯	SD	X¯	SD
Sleep Onset Time1,2	22:41	0:21	22:42	0:35	22:58	0:23	23:04	0:35
Sleep Offset Time1	7:07	0:16	6:13	0:13	6:27	0:23	6:22	0:19
Sleep Duration1	8:26	0:13	7:31	0:19	7:29	0:11	7:18	0:19
Sleep Efficiency3	95.72	2.57	96.94	1.60	92.43	6.65	94.50	3.69

¹In hours and Minutes HH:MM;

²24 hour clock;

³Sleep efficiency is reported in percentages, using the following formula: (sleep time/time in bed ⋗ 100).