University
Upper secondary education
Post-secondary vocational education
Lower secondary education
Didn't finish primary school
I don't know / No mother
I don't know / No father
Ok
Hot
Cold
Morning
Noon
Afternoon
Evening
Good
Bad
Not very good
Stable
Less than 7hrs
7hrs or more
Less than 4 times
4 times or more
Every 30min or less
Between 30 and 60min
Every more than 60min
No mobile phone
Regular
Less than 8 hrs
Between 8 to 10 hrs
More than 10 hrs
Less than 1h
From 1h to 3hrs
More than 3hrs
Yes
No
Girl
Boy
Other
Relax
Read
Homework
Mobil
Stress
Sometimes
Yes but not today
Yes and today
Yes but no effect
Yes and effect
Highly skilled
Non-manual
Manual
Less than 12hrs
12hrs - 24hrs
More than 24hrs