Table 4.

Simplified Berlin questionnaire.

B1	“Do you snore?”	No/do not know/yes
B6	“How often do you	Never or almost never
	feel tired or fatigued	1–2 times a month
	after your sleep?”	1–2 times a week
		3–4 times a week
		Every day
or
B7	“During your waking time,	Never or almost never
	do you feel tired,	1–2 times a month
	fatigued or not up to	1–2 times a week
	par?”	3–4 times a week
		Every day
B10	“Do you have high	No
	blood pressure?”	Do not know
		Yes