Table 4.

Comparisons of sleep habits between elementary and middle school students.

Qn #	Item description	P value (t-test)	P value (χ 2)
2	Trouble sleeping		0.00∗
3	Likes to sleep		0.00∗
Block 1: bedtime resistance		0.01∗
4	Do you go to bed at same time every night on school nights?		0.00∗
5	Do you fall asleep in same bed every night?		0.00∗
6	Do you fall asleep alone?		0.00∗
7	Do you falls asleep in parents', brother's, or sister's bed?		0.57
9	Do you fight with your parents about going to bed?		0.00∗
10	Is it hard for you to go to bed?		0.35
11	Are you ready for bed at your usual bedtime?		0.01∗
15	Do you stay up late when parents think you are asleep?		0.00∗
Block 2: sleep onset delay
8	Do you fall asleep in about 20 minutes?		0.00∗
Block 3: sleep anxiety		0.82
12	Do you have a special thing you bring to bed?		0.00∗
13	Are you afraid of the dark?		0.00∗
14	Are you afraid of sleeping alone?		0.00∗
Block 4: sleep duration		0.15
16	Do you think you sleep too little?		0.00∗
17	Do you think you sleep too much?		0.00∗
Block 5: night awakening		0.66
18	Do you wake up at night when parents think you are asleep?		0.05
19	Do you have trouble falling back to sleep if you wake up during the night?		0.00∗
20	Do you have nightmares?		0.00∗
21	Does pain wake you up at night? Where is that pain?		0.11
22	Do you sometimes go to someone's bed during the night? If yes who?		0.00∗
Block 6: daytime sleepiness		0.00∗
23	Do you have trouble waking up in the morning?		0.27
24	Do you feel sleepy during the day?		0.00∗
25	Do you take naps during the day?		0.00∗
26	Do you feel rested after a night's sleep?		0.00∗
Questions 2 to 26 (overall score)		0.78

^∗ P < 0.05.

Qn #: question number; χ ²: chi square.