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
Characteristics of
home environment
S:SHS-A 1
O:LSAC
O:SDV
P:SHS-A 1
P:HOME
O:HOME
P:SDV 3
O 3
P:SHS-A 1 2
P:SDV 2 3
P:SHS-A 1
P:HOME
O:HOME
P:SDV 3
O 3
P:SHS-A 1 P:SHS-A 1 P:SHS-A 1 P:SHS-A 1
Smoke exposure P:SDV P:SDV 2 P:SDV P:SDV P:SDV P:SDV P:SDV
Animal/pet exposure P:HOME
O:HOME
P:HOME
O:HOME

Featured measurements

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 Single item about any housing issues from the Social History Screen was used; e.g. overcrowding, roaches, rodents, utilities, mould, lead
2 Completed at 18 months if not completed at 1 year visit
3 16 safety items based on the RCH Safety Centre and KidSafe checklists. E.g. presence of stairs, safety barriers, heating, location of medications and cleaning products

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)