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
Childcare P:SDV P:SDV P:HOME P:SDV P:HOME   P:SDV P:LSAC
P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV
  P:LSAC
P:SDV
Playgroup         P:SDV   P:SDV                
Kindergarten/preschool               P:LSAC P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV
P:LSAC
P:SDV P:SDV
P:LSAC
  P:SDV
P:LSAC
School attendance P:PedsQL-4.0 P:PedsQL-4.0 P:PedsQL-4.0 P:PedsQL-4.0 1 P:PedsQL-4.0
P:SDV
P:PedsQL-4.0 1 P:PedsQL-4.0
P:SDV
P:ATPG3 2
School functioning P:PedsQL-4.0 P:PedsQL-4.0 P:PedsQL-4.0 P:PedsQL-4.0 1 P:PedsQL-4.0 P:PedsQL-4.0 1 T:AvEDI 3
Academic competence T:LSAC 4
Educational special needs T:AvEDI 3
School demographics P:SDV P:SDV P:SDV
Teacher characteristics T:SDV 5

Featured measurements

ATPG3: Australian Temperament Project Generation 3 derived
AvEDI: Australian version of the Early Development Instrument
CPOL: Classroom Promotion of Oral Language derived
LSAC: Longitudinal Study of Australian Children derived
PedsQL-4.0: Pediatric Quality of Life Inventory – 4.0 Generic Core Scales
SDV: Study Devised Variable

Notes

1 Completed at half year phone interview if not completed at previous face-to-face visit
2 School attendance (attending school or remote learning) and effect of school changes on mother and child items adapted from ATPG3
3 7 items from the AvEDI (as used in the 2018 Australian Early Development Census cycle) were used
4 5 items from the reading competencies scale and 3 global academic rating questions (mathematical skills, language and literacy skills, overall academic achievement) from LSAC were used
5 Child’s first year of school teacher was asked a series of demographics (age, gender, full/part time teaching status, years teaching, highest educational qualiification), teaching qualifications (undergraduate teaching degree, specialisation, years since initial teaching qualification) and education sector (state, Catholic, independent) questions; based on LSAC and CPOL questions

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)