Table 1.

Frequency and percent of all study variables

Variable	N	%	Response rate
1- Take daytime naps lasting two hours
Yes	1859	71	85
No	760	29
2- woke and went up at approximately the same time from day to day or weakened and holidays
Yes	772	25.2	99
No	2289	74.8
3- Drank caffeinated beverages
Yes	668	21.8	99.3
No	2400	78.2
4- Used cigarette/tobacco
Yes	439	14.3	99.2
No	2627	85.7
5- Exercised within 4 hours of bed time (to the point of sweating)
Yes	582	19	99.1
No	2481	81
6- Worried, planned, or thought about important matters and daily activities
Yes	1264	41.5	98.5
No	1780	58.5
7- Read in bed
Yes	1088	35.6	98.9
No	1968	64.4
8-Watched TV in bed
Yes	1698	55.3	99.9
No	1371	44.7
9- Talked on the phone
Yes	1021	33.3	99.2
No	2044	66.7
10- Slept in a room with un comfortable temperature, noisy environment and bright room
Yes	671	21.8	99.5
No	2403	78.2
11- woke and went up at approximately the same time in weekend and holiday
Yes	1372	44.8	99.2
No	1693	55.2
12- Having a regular exercise program during the week
Yes	1199	39.3	98.8
No	1855	60.7
13- Watched clock and worried about time to sleep in bed
Yes	1230	40	99.4
No	1842	60
14- Ate heavy dinner (within 2 hours of going to bed)
Yes	735	23.9	99.5
No	2339	76.1