|
Factors | Number | Items | Factor loading |
|
First factor: sleep onset and continuity disorder | 1 | When I go to bed, it takes me a long time to fall asleep. | 0.807 |
2 | Overall quality of sleep (no matter how long you slept) | 0.784 |
3 | Awaken during my sleep time and have trouble falling asleep again | 0.762 |
4 | Total sleep duration | 0.756 |
5 | I wake up earlier than my preference time | 0.526 |
6 | I am aggressive and irritable in the morning | 0.405 |
|
The second factor: disorder in daytime functioning | 7 | I wake up suddenly from sleep with an unpleasant feeling of fear, anxiety, tension, or unhappiness | 0.765 |
8 | I have a lot of nightmares in the sleep time | 0.713 |
9 | I sometimes have unusual feelings in my legs at night, such as creeping, crawling, tingling burning, or itching sensations | 0.600 |
10 | I wake up in the morning with feeling of fatigue and exhaustion | 0.608 |
11 | I have headache in the morning after waking up | 0.604 |
12 | I feel drowsy or sleepy during the day | 0.451 |
13 | I have no enough concentration in the day because of sleepiness | 0.418 |
|
Third factor: sleep disturbance caused by environmental factors | 14 | I can not sleep because of turned on lights | 0.696 |
15 | I can not sleep because of environmental noise (such as cell phones, noise from medical instrument, crosstalk of nurses, and moan of other patients) | 0.690 |
16 | I can not get into a comfortable position in bed (by bed or pillow) which causes sleep disturbance | 0.676 |
17 | I can not sleep because of unpleasant ward’s odor | 0.666 |
18 | I wake up from sleep because of high increased or decreased temperature | 0.574 |
|
Fourth factor: disorder caused by cardiac disease | 19 | I have cardiac problems in my sleep recently (chest pain, palpitation) | 0.714 |
20 | I wake up from sleep because of chest pain | 0.432 |
|
Fifth factor: respiratory disorder during sleep | 21 | I must sleep in special position (lying down on pillow, using two pillow for elevating head) | 0.838 |
22 | I wake up from sleep because of snoring | 0.808 |
23 | I wake up from sleep because of short of breath or chocking | 0.538 |
|