Year ≥ 2008
Time Enrolment
Age Pregnancy and birth Early life 0-3 years Childhood 3-12 years Teenage 13-19 years
Date of birth P:SDVM F C
Country of birth P:SDVM F C
Education level P:SDVM F
Employment P:SDVM F
Ethnicity P:SDVG
N:SDVC
Marital status P:SDVM F
People living in household P:SDV
Postcode P:SDV
Sex O
Birth order P:SDVC
Siblings P:SDVC
Socio-demographic score P:SEIFAM F
S – self report
P – parent report
C – child report
T – teacher report
N – welfare nurse
O – observation
XM: Mother
XF/P: Father/partner
XC: Child
XS: Sibling
XG: Grandparent

SDV: Study Devised Variable
SEIFA: Socio-Economic Indexes for Areas