Table A1 Likert scores used to measure sleep quality and daytime function
How would you describe your overall sleep quality over the last 4 weeks?
Extremely poor1234567Extremely good
How disturbed or interrupted has your sleep been over the last four weeks?
Not at all1234567Extremely
How refreshed have you felt in the morning after waking up in the last 4 weeks?
Not at all1234567Extremely
How alert have you felt during the daytime over the last four weeks?
Not at all1234567Extremely