Table 1.

4-week Recall Questionnaire Likert Scales

Variables	Likert Scale
Frequency of:
Trouble falling asleep;	1 = Not in past 4 weeks
Waking up often during the night;	2 = Less than once per week
Awakening earlier than planned;	3 = 1–2 times per week
Daytime napping	4 = 3–4 times per week
	5 = 5 or more times per week
Overall sleep quality on typical night	1 = Very restless
	2 = Restless
	3 = Average quality
	4 = Sound or restful
	5 = Very sound or restful
Hours of sleep on typical night	5 h or Less
	6 h
	7 h
	8 h
	9 h
	10+ h