Trial phase Antenatal screening Antenatal Enrolment and Baseline Randomisation 6 w old follow-up 6 m old follow-up 1 y old follow-up 18 m old follow-up 2 y old follow-up End Phase 1 2.5 y old follow-up 3 y old follow-up 3.5 y old follow-up 4 y old follow-up 4.5 y old follow-up 5 y old follow-up 5.5 y old follow-up First year of school follow-up (5-6 y old) 6 y old follow-up *COVID-19 Supplement (6-7 y old) End Phase 2
Year 2013-2014 2013-2014 2013-2014 2013-2014 2013-2015 2014-2015 2014-2016 2015-2016 2015-2017 2016-2017 2016-2018 2017-2018 2017-2019 2018-2019 2018-2020 2019-2021 2019-2020 2020
Age/DOB S:SDV M Si S:SDV M Pa Si P:SDV C Pa P:SDV Pa P:SDV C Pa Si P:SDV Pa Si P:SDV Pa Si P:SDV Pa Si P:SDV C Pa Si P:SDV Pa Si P:SDV C Pa Si P:SDV Pa Si P:SDV C Pa Si P:SDV Pa Si P:SDV C Pa Si
Sex P:SDV Si P:SDV C P:SDV C Si P:SDV Si P:SDV C P:SDV C P:SDV C P:SDV C
Multiple birth P:SDV P:SDV C P:SDV C P:SDV C P:SDV C
Education (level completed, current study status) S:SDV S:SDV M Pa S:SDV Pa S:SDV Pa S:SDV M Pa S:SDV Pa S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1 S:SDV M Pa 1
Employment status S:SDV S:SDV M Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa
S:LSAC
S:SDV Pa S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
S:SDV Pa
S:LSAC
Occupation S:SDV M Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa S:SDV Pa
Housing tenure S:SDV
S:SHS-A 2
S:SDV 3
P:SDV P:SDV P:SDV
P:SHS-A 2
P:SDV 3
P:SDV
P:SHS-A 2 4
P:SDV 3 4
P:SDV
P:SHS-A 2
P:SDV 3
P:SDV P:SDV
P:SHS-A 2
P:SDV 3
P:SDV P:SDV
P:SHS-A 2
P:SDV 3
P:SDV P:SDV
P:SHS-A 2
P:SDV 3
P:SDV P:SDV
P:SHS-A 2
P:SDV 3
S:CRISIS
Characteristics of home environment S:SHS-A 5
O:LSAC
O:SDV
P:SHS-A 5
P:HOME
O:HOME
P:SDV 6
O 6
P:SHS-A 4 5
P:SDV 4 6
P:SHS-A 5
P:HOME
O:HOME
P:SDV 6
O 6
P:SHS-A 5 P:SHS-A 5 P:SHS-A 5 P:SHS-A 5
Locality (postcode) S:SDV S:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV P:SDV *
Household composition S:SDV S:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7 P:SDV 7
Marital/relationship status S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV
Siblings S:SDV C S:SDV C
Birth order (siblings) S:SDV C P:SDV C
Income/financial situation S:SDV S:SDV Fam
S:LSAC
S:SDV Fam S:SDV Fam S:SDV Fam
S:LSAC
S:SDV Fam
S:LSAC 4
S:SDV Fam
S:LSAC 8
S:SDV Fam S:SDV Fam
S:LSAC 8
S:SDV Fam S:SDV Fam
S:LSAC 8
S:SDV Fam S:SDV Fam
S:LSAC 8
S:SDV Fam S:SDV Fam
S:LSAC 8
S:ATP 9
Government concession cards/allowances
(income support payments)
S:SDV S:SDV S:SDV S:SDV S:SDV
Support services utilisation (e.g. Centrelink, charities,
counselling services, disability or housing services)
P:LSAC M C P:LSAC M C
Contact with child protection services P:SDV P:SDV P:SDV P:SDV P:SDV
Ethnicity S:SDV
Ethnicity (Aboriginal or Torres Strait Islander status) S:SDV
Place of birth S:SDV M G 10
Immigration to Australia S:SDV
Language(s) spoken at home S:SDV P:SDV P:SDV T:AvEDI 11 P:SDV

Featured measurements

ATP: Australian Temperament Project derived
AvEDI: Australian version of the Early Development Instrument
CRISIS: CoRonavIruS Health Impact Survey (various instruments)
HILDA: Household, Income and Labour Dynamics in Australia (HILDA) Survey derived
HOME: Home Observation for the Measurement of the Environment
KHSC: Kidsafe Home Safety Checklist
LSAC: Longitudinal Study of Australian Children derived
RHSC: Royal Children's Hospital Home Safety Checklist
SDV: Study Devised Variable
SHS-A: Social History Screen - Adapted

Notes

1 Includes an item about mother’s future plans of study
2 Single item about threat of eviction or losing home from the Social History Screen was used
3 Number of times moved in the past year
4 Completed at 18 months if not completed at 1 year visit
5 Single item about any housing issues from the Social History Screen was used; e.g. overcrowding, roaches, rodents, utilities, mould, lead
6 16 safety items based on the RCH Safety Centre and Kidsafe home safety checklists. E.g. presence of stairs, safety barriers, heating, location of medications and cleaning products
7 Including ages of children living in household, by age bracket: 0-4, 5-12 and 13-18 years
8 Includes 7 items about financial insecurity in addition to single item about raising emergency money
9 Items adapted from HILDA (Wave 18 Household Survey), as used by ATP
10 Asked if mother’s parents were born overseas and in Non-English speaking countries
11 7 items from the AvEDI (as used in the 2018 Australian Early Development Census cycle) were used
* Only asked as part of COVID-19 supplement if completed separately from regular assessments

Legend

A = Administration report abstraction
C = Index child report (reporting on others)
L = Linkage (to other databases)
M = Medical records data abstraction
O = Observation/direct assessment
N = Nurse report
P = Parent/primary caregiver report
Pe = Peer report
S = Self report
T = Teacher report
X = Undefined
X BF = Pertaining to biological father
X BM = Pertaining to biological mother
C = Pertaining to index child
X F = Pertaining to father
X Fam = Pertaining to family
X G = Pertaining to grandparent(s)
X M = Pertaining to mother
X P = Pertaining to parent(s)
X Pa = Pertaining to partner
X Pe = Pertaining to peers
X Pr = Pertaining to primary caregiver
X Si = Pertaining to sibling(s)