Refreshing Sleep and Sleep Continuity Determine Perceived Sleep Quality

Table 3

Factor loadings of 34 Sleep Questionnaire and Sleep Symptom Checklist items.

	Daytime difficulty	Sleep initiation problem	Sleep maintenance problem	Psychological distress	Sleep apnea symptoms	Non-refreshed in morning
Sleepy during the day? (10 = very)	.877
Tired during the day? (10 = very)	.821
Daytime sleepiness (3 = very severe)	.807
Daytime fatigue (3 = very severe)	.739
Falling asleep during the day when not wanted (3 = very severe)	.652
Naps, days/wk.	.576
Difficult to concentrate? (10 = very)	.557
Trouble falling asleep (3 = very severe)		.774
Insomnia distress (10 = very)		.729
Insomnia (3 = very severe)		.726
Do you have insomnia? (yes/no)		−.708
Tension when falling asleep (100 = very tense)		.696
SOL (hrs.)		.618
WASO (hrs.)			.790
TST (hrs.)			−.723
Waking up and trouble getting back to sleep (3 = very severe)			.689
Waking up too early in the morning (3 = very severe)			.576
Depression (3 = very severe)				.781
Poor emotional well-being (3 = very severe)				.781
Anxiety (3 = very severe)				.710
Interruption of breathing during sleep (3 = very severe)					.853
Snoring (3 = very severe)					.767
Waking with a dry mouth (3 = very severe)					.587
Refreshed in the morning (10 = very refreshed)						n/a
Sleep is non-refreshing (3 = very severe)						n/a