Gender. Which one of the following describes you best?
0 = Missing
1 = Boy
2 = Girl
3 = Neither and I don't want to say

How would you describe the place where you live?
0 = Missing
1 = A city or town
2 = A village or in the country
3 = I’m not sure

Do you have a long term disability, illness or medical condition?
0 = Missing
1 = Yes
2 = No
3 = I'm not sure

If yes, what disability/medical condition do you have? Physical disability (e.g. walking or getting around)
0 = Child does not have long term illness and Missing
1 = Ticked
2 = Not ticked

Which of your parents do you live with?
0 = Missing
1 = My mum and dad in the same house
2 = My mum for all or most of the time
4 = My mum for half of the time and my dad for half of the time
5 = My dad for all or most of the time/Somebody else

Do you have your own bedroom for yourself in the home where you normally live?
0 = Missing
1 = No
2 = Yes

How many bathrooms (room with a bath/shower or both) are there in the home where you normally live?
0 = Missing
1 = None
2 = One
3 = Two
4 = More than two

Does your family own a car, van or truck?
0 = Missing or I don't live with a family'
1 = No
2 = Yes, one
3 = Yes, two or more
4 = I do not live with a family

How many computers (including laptops and tablets not including game consoles and smartphones) do your family own?
0 = Missing or don't live with a family
1 = None
2 = One
3 = Two
4 = More than two

How many times did you and your family travel out of Northern Ireland or Ireland for a holiday last year?
0 = Missing or don't live with a family
1 = Not at all
2 = Once
3 = Twice
4 = More than twice

Does your family have a dishwasher at home?
0 = Missing or don't live with a family
1 = No
2 = Yes

Family Affluence Scales recoded
0 = Missing
1 = Low affluence
2 = Medium affluence
3 = High affluence

Looking back over the time that you were at this school, would you say you were mostly happy at this school or mostly unhappy?
0 = Missing
1 = Mostly happy
2 = Mostly unhappy
3 = I can't decide

Have you personally ever been bullied in school?
0 = Missing
1 = Yes
2 = No
3 = I don’t know

If yes, what form(s) did this bullying take? Being teased or called hurtful names.
-2 = Child had not been bullied in last 3 months or missing
0 = Missing or never bullied
1 = Ticked
2 = Not ticked

How many times during a normal week would you spend at least 60 minutes during a day playing sports or doing some physical activity?
0 = Missing
1 = Never
2 = Up to 4 times a week
3 = 4 – 6 times a week
4 = 7 times a week
5 = More often

How much do you enjoy PE classes in school?
0 = Missing
1 = A lot
2 = A little
3 = Not at all
4 = I don't do this

How important is this reason to you for taking part in sports or physical activity? To be fit and healthy.
0 = Missing
1 = Very important
2 = Somewhat Important
3 = Not very important
4 = Not important
5 = I can’t choose

Do you have any sports idols? These are the sports personalities that you admire.
0 = Missing
1 = Yes I have a sports idol
2 = No I do not have a sports idol

Have you ever received any tuition or coaching from an instructor or coach (other than in PE lessons) to help improve your performance in any sport or physical activity?
0 = Missing
1 = Yes
2 = No
3 = I can't remember

How much do you think sport or physical activity help to improve your physical health?
0 = Missing
1 = A lot
2 = A little
3 = Not at all
4 = I don't know

In a normal week would you walk or cycle to school?
0 = Missing
1 = Yes
2 = No

Would the following make you feel worried or stressed? Problems or arguments at home/with my family.
1 = Ticked
2 = Not ticked or missing

How much do you agree or disagree with the following statement? 'Spending time with my family/carers' might make you feel better if you are worried or stressed.
0 = Missing
1 = Strongly agree
2 = Agree
3 = Disagree
4 = Strongly disagree
5 = I don’t know

How much do you agree or disagree with the following statement? 'Spending time with/looking after my pets' might make you feel better if you are worried or stressed.
0 = Missing
1 = Strongly agree
2 = Agree
3 = Disagree
4 = Strongly disagree
5 = I don’t know
6 = I don't have any pets

In general, how would you describe your mental health and wellbeing?
0 = Missing
1 = Excellent
2 = Very good
3 = Good
4 = Fair
5 = Poor

In the last 6 months have you been doing this more often, less often or about the same? Eating 3 meals each day.
0 = Missing
1 = More
2 = Same
3 = Less
4 = I don't know

How do you think your family/carers are managing with money for ordinary and special things?
0 = Missing
1 = I think we have enough money for ordinary things and special things
2 = I think we have enough money for ordinary things but not for some special things
3 = I don’t think we have enough money for ordinary things or for special things
4 = I don’t know

Thinking about the last week, have you felt fit and well?
0 = Missing
1 = Not at all
2 = Slightly
3 = Moderately
4 = Very
5 = Extremely

Thinking about the last week, have you felt full of energy?
0 = Missing
1 = Never
2 = Seldom
3 = Quite often
4 = Very often
5 = Always

Have you felt sad? (Recoded for computing KIDSCREEN scale)
0 = Missing
1 = Always
2 = Very often
3 = Quite often
4 = Seldom
5 = Never