Table 1.

Sleep Patterns in Egyptian Families (Means and Standard Deviations) and by Gender, Age, and Sample Site (n=622)

	Night								Day						Total Sleep
	onset		offset		duration		arousals		onset		offset		duration		per day
	mean time	SD, hours	mean time	SD, hours	mean hours	SD	mean n	SD	mean time	SD, hours	mean time	SD, hours	mean hours	SD	mean hours	SD
All	0:45	1.8	8:32	2.6	7.6	2.2	0.7	1.1	15:45	1.5	17:29	1.8	1.8	1.0	8.4	2.6
Gender
Female	0:24	1.7	8:32	2.5	7.9	2.2	0.8	1.1	15:48	1.7	17:24	1.6	1.8	1.0	8.8	3.1
Male	1:02	1.8	8:36	3.0	7.4	2.2	0.6	1.2	15:38	1.4	17:29	2.1	1.8	1.1	8.0	2.5
Age, years
2–10	23:20	1.4	8:56	1.2	9.8	1.9	0.9	1.6	15:11	1.3	17:19	1.7	2.1	0.8	11.0	3.6
10–20	1:03	1.8	9:31	2.2	8.3	1.5	0.6	1.1	15:41	2.2	17:28	2.4	1.9	1.4	8.8	2.2
20–30	1:50	1.6	9:06	3.3	7.0	2.7	0.7	1.0	16:00	1.7	18:30	1.5	2.3	1.0	7.8	3.1
30–40	0:59	1.8	8:36	3.0	7.2	2.2	1.0	1.3	15:34	0.9	17:04	1.1	1.6	0.9	8.1	2.6
40–60	0:21	1.5	7.38	2.9	6.5	1.8	0.5	0.9	16:00	1.4	17:16	1.9	1.4	1.0	7.5	2.1
Co-sleep
Yes	0:19	1.6	7:49	1.9	7.5	2.0	0.6	1.0	15:46	1.5	17:25	1.8	1.7	0.9	8.2	2.6
No	1:32	1.8	9:57	3.2	8.1	2.2	0.9	1.4	15:43	1.6	17:32	2.0	1.9	1.1	8.7	3.1
Site
Urban	1:35	1.8	9:10	3.0	7.6	2.4	1.1	1.5	16:03	1.6	17:46	2.1	1.8	1.2	8.3	2.7
Village	0:05	1.6	7:47	2.1	7.7	1.2	0.4	0.6	15:22	1.4	17:07	1.5	1.8	0.7	8.6	3.0