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
Parent-child relations P:SDV 1 P:HOME
O:HOME
P:SDV 1
O:SDV 2
P:SDV 1 P:HOME
O:HOME
P:SDV 1
O:SDV 2
P:SDV 1 P:SDV 1
P:CPRS
P:SDV 1 P:SDV 1
P:CPRS
P:SDV 1 P:SDV 1
P:CPRS
P:SDV 1 P:SDV 1
P:CPRS
P:SDV 1 *
Parenting behaviour P:LR 3
P:BPCIS 4
P:HOME
O:HOME
O:SDV 2
P:CRQ
5
P:ECLS-B
6
P:BB
P:LR 3
P:BPCIS 4
P:CRQ
5 7
P:ECLS-B 6 7
P:BB

P:LSAC
P:SDV
P:HOME
O:HOME
O:SDV 2
P:CRQ 5
P:ECLS-B 6
P:BB
P:LSAC
P:SDV
P:LR 3
P:BPCIS 4
P:BB

P:SDV
P:CRQ 5
P:ECLS-B 6
P:BB
P:LR 3
P:BPCIS 4
P:BB

P:SDV
P:CRQ 5
P:ECLS-B 6
P:BB
P:LR 3
P:BPCIS 4
P:BB

P:SDV
P:CRQ 5
P:ECLS-B 6
P:MCS 8
P:LSAC 9
P:BB
P:BB
P:SDV
T:AvEDI 10
P:CRQ 5
P:ECLS-B 6
P:MCS 8
P:LSAC 9
P:BB
Contact with child
protection services
P:SDV P:SDV P:SDV P:SDV P:SDV
Parental self-efficacy P:ECLS-B 6
P:ECLS-B 11
P:HOME
P:ECLS-B 6 7
P:ECLS-B 7 11
P:ECLS-B 6
P:ECLS-B 11
P:HOME
P:ECLS-B 6
P:ECLS-B 11
P:ECLS-B 6
P:ECLS-B 11
P:ECLS-B 6
P:ECLS-B 11
P:ECLS-B 6
P:ECLS-B 11
Health literacy S:SDV 12 S:SDV 12 S:SDV 12 S:SDV 12

Featured measurements

AvEDI: Australian version of the Early Development Instrument
BB: Baby Business derived
BPCIS: Brigance Parent-Child Interactions Scale
CPRS: Child-Parent Relationship Scale
CRQ: Child Rearing Questionnare
ECLS-B: Early Childhood Longitudinal Study of Children - Birth Cohort derived
ELVS: Early Language in Victoria Study derived
HOME: Home Observation for the Measurement of the Environment
LR: Let's Read derived
LSAC: Longitudinal Study of Australian Children derived
MCS: Millenium Cohort Study derived
SDV: Study Devised Variable

Notes

1 Single item about parent’s rating of relationship with child, with response options aligned with those used in the Self-Rated Health measure
2 5 minute videos of unstructured play were analysed to measure maternal-child interactions (maternal responsive behaviours). Technique adapted from: Levickis, P., Reilly, S., Girolametto, L., Ukoumunne, O.C. and Wake, M. (2014). Maternal behaviors promoting language acquisition in slow-to-talk toddlers: prospective community-based study. J Dev Behav Pediatr, 35(4): 274-81. doi:10.1097/DBP.0000000000000056
3 3 items about reading to the child, based on the Let’s Read study
4 An adapted 10-item version of the BPCIS as previously used in ELVS was used
5 The 6-item parental warmth subscale, as used in LSAC, was used
6 The 5-item hostile parenting and 4-item parental self-efficacy (age appropriate) subscales, as used in LSAC, were used
7 Completed at 18 months if not completed at 1 year visit
8 Single item about helping the child to read was adapted from the MCS
9 Items from the Home Activies Index from LSAC, measuring the home learning environment and shared parent-child activities, were used
10 2 items relating to parental engagement with learning from the AvEDI (as used in the 2018 Australian Early Development Census cycle) were used
11 Single item global rating of self-efficacy, as modified and used in LSAC, was used
12 Self report items assessing mothers’ knowledge, attitudes and beliefs about paediatric health
* 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)