Year ≥ 2011 ≥ 2012 ≥ 2014
Wave 1 – Enrolment 2 – Assessment (researcher home visit) plus 5-7 year questionnaires (see Wave 1 for content) 3 – Assessment (researcher home visit) plus 9-12 year questionnaires (see Wave 1 for content)
Age 1-12 months 13-24 months 2-4 years 5-7 years 8-12 years Enrolment supplement (from 13 months) 5-7 years 9-12 years
Age/date of birth P:SDVP P:SDVP
Birth order P:SDVC P:SDVC
Country of birth P:SDVP P:SDVP
Caregiver relationship to child (e.g. biological parent, step parent, grandparent) P:SDVP P:SDVP
Education level P:SDVP P:SDVP
Employment P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM
Income/finance P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM P:SDVFAM
Living arrangements P:SDVR P:SDVR P:SDVR P:SDVR P:SDVR P:SDVR
Siblings P:SDV P:SDV
Sex P:SDVP P:SDVP P:SDVP P:SDVP P:SDVP P:SDVP
Health care card P:SDVP P:SDVP P:SDVP P:SDVP P:SDVP P:SDVP
Disability/carers allowance P:SDVC P:SDVC P:SDVC P:SDVC P:SDVC P:SDVC
Language spoken at home P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV

P – Primary caregiver report
P:XXR – Primary caregiver report pertaining to primary caregiver
P:XXP – Primary caregiver report pertaining to primary caregiver’s partner
P:XXC – Primary caregiver report pertaining to child
P:XXFAM – Primary caregiver report pertaining to family
P:XXS – Primary caregiver report pertaining to siblings
S:XXC – Self report by child
O – Observation/direct assessment

SDV: Study Devised Variable