1 = Younger cohort
2 = Older cohort

Site numeric code
10 = Sintra
01 = Ottawa
11 = Suzhou
02 = Houston
03 = Bogota
04 = Manizales
06 = Helsinki
07 = Moscow
08 = Istanbul
09 = Daegu

Test language 3-letter code-Parent
SPA = Spanish
ITA = Italian
FRE = French
SWE = Swedish
ENG = English
CHI = Chinese
FIN = Finnish
KOR = Korean
TUR = Turkish
RUS = Russian
PRT = Portugese

Total time spent (minutes) - Parent
999999 = Missing (missing end date)

ISCO of mother or female guardian
0 = Armed Forces Occupations
1 = Managers
2 = Professionals
3 = Technicians and Associate Professionals
4 = Clerical Support Workers
5 = Services and Sales Workers
6 = Skilled Agricultural, Forestry and Fishery Workers
7 = Craft and Related Trades Workers
8 = Plant and Machine Operators and Assemblers
9 = Elementary Occupations
9996 = Invalid
9997 = Not Applicable
9999 = Omitted

1 = Strongly disagree
2 = Disagree
3 = Neither agree nor disagree
4 = Agree
5 = Strongly agree
7 = N/A
9 = Omitted

Physical problems
1 = Not at all accurate
2 = Slightly accurate
3 = Somewhat accurate
4 = Very accurate
5 = Perfectly accurate
7 = N/A
8 = Missing by design
9 = Omitted

Birth Month - Student
97 = N/A
98 = Missing by design
99 = Omitted

Birth Year - Student
9997 = N/A
9998 = Missing by design
9999 = Omitted

Who completing questionnaire
1 = Mother
2 = Other female guardian
3 = Father
4 = Other male guardian
5 = Other
7 = N/A
8 = Missing by design
9 = Omitted

Age - Mother or female guardian
1 = 24 years or younger
2 = 25-29 years
3 = 30-34 years
4 = 35-39 years
5 = 40-44 years
6 = 45-49 years
7 = 50 or older
8 = [Country specific]
9 = [Country specific]
10 = Deceased
97 = N/A
98 = Missing by design
99 = Omitted

People living in home: Mother(s) (or female guardian)
1 = None
2 = One
3 = Two
4 = Three or more
7 = N/A
8 = Missing by design
9 = Omitted

How many: Younger siblings
1 = None
2 = One
3 = Two
4 = Three
5 = More than three
7 = N/A
8 = Missing by design
9 = Omitted

Highest level of formal education completed - Mother or female guardian
1 = ISCED 1
2 = ISCED 2
3 = ISCED 3
4 = ISCED 4
5 = ISCED 5
6 = ISCED 6
7 = ISCED 7
8 = ISCED 8
97 = N/A
98 = Missing by design
99 = Omitted

Current employment situation - Mother or female guardian
1 = Not working
2 = Volunteer work or other non-paid activity
3 = Casual or non-regular work
4 = Regular part-time work (less than 50% of full-time hours)
5 = Regular part-time work (between 50% and 90% of full-time hours)
6 = Regular Full-time work
7 = N/A
8 = Missing by design
9 = Omitted

Language at home - Student
1 = Assessment Language
2 = Other
7 = NA
9 = Omitted

Area you live - people help each other out
1 = Strongly disagree
2 = Disagree
3 = Neither agree nor disagree
4 = Agree
5 = Strongly agree
7 = N/A
8 = Missing by design
9 = Omitted

Age started attending - [ISCED 0]
1 = Did not attend [ISCED 0]
2 = Before age 1
3 = Age 1
4 = Age 2
5 = Age 3
6 = Age 4
7 = Age 5
8 = Age 6
9 = Age 7
97 = N/A
98 = Missing by design
99 = Omitted

Age started attending - [ISCED 1]
1 = Age 3
2 = Age 4
3 = Age 5
4 = Age 6
5 = Age 7
6 = Age 8
7 = Age 9
97 = N/A
98 = Missing by design
99 = Omitted

Type of provider - [pre-primary education arrangement]
1 = Public management and mainly public funding
2 = Private management and mainly public funding
3 = Private management and mainly private funding
7 = N/A
8 = Missing by design
9 = Omitted

[Supervision and care (e.g. national example 1)]
1 = No
2 = Yes
7 = N/A
8 = Missing by design
9 = Omitted

Friends - different country
1 = None or very few
2 = Some
3 = Many
4 = All or almost all
5 = No children with such characteristics in our area
6 = Don't know / Not sure
7 = N/A
8 = Missing by design
9 = Omitted

Child do - brush their teeth
1 = Once a week or less
2 = 2-3 days a week
3 = 4-6 days a week
4 = Every day
7 = N/A
8 = Missing by design
9 = Omitted

Child health
1 = Excellent
2 = Very Good
3 = Good
4 = Fair
5 = Poor
7 = N/A
8 = Missing by design
9 = Omitted

Overall life satisfaction
0 = Not at all satisfied
10 = Completely satisfied
97 = N/A
98 = Missing by design
99 = Omitted

Last two weeks - felt cheerful and in good spirits
1 = At no time
2 = Some of the time
3 = More than half of the time
4 = Most of the time
5 = All of the time
7 = N/A
8 = Missing by design
9 = Omitted

Mother/female guardian - understands the child
1 = Almost never or never true
2 = Sometimes true
3 = Often true
4 = Almost always or always true
7 = N/A
8 = Missing by design
9 = Omitted

Encourage child - study hard and be responsible
1 = None at all
2 = Little
3 = Somewhat
4 = A lot
7 = N/A
8 = Missing by design
9 = Omitted

With Child - discuss child school progress
1 = Never or hardly ever
2 = Once or twice a year
3 = Once or twice a month
4 = Once or twice a week
5 = Every day or almost every day
7 = N/A
8 = Missing by design
9 = Omitted

School-related - discuss behaviour with teacher on my initiative
1 = No
2 = Yes
3 = Not supported by school
7 = N/A
8 = Missing by design
9 = Omitted

Number of child friends
1 = None
2 = Some
3 = Many
4 = All
7 = N/A
8 = Missing by design
9 = Omitted

Know who child with when not at home
1 = All of the time
2 = Most of the time
3 = Some of the time
4 = Only rarely or never
7 = N/A
8 = Missing by design
9 = Omitted

ISEI of mother or female guardian
99 = Omitted

Country of birth - Student
1 = Country of test
2 = Other
7 = NA
9 = Omitted