Year ≥ 2011 ≥ 2012 ≥ 2014 ≥ 2020
Wave 1 – Enrolment 2 – Assessment (researcher home visit)
plus 5-7 year questionnaires (see Wave 1 for content)
3 – Assessment (researcher home visit)
plus 9-12 year questionnaires (see Wave 1 for content)
Supplementary COVID wave
Age 1-12 months 13-24 months 2-4 years 5-7 years 8-12 years Enrolment supplement (from 13 months) 5-7 years 9-12 years 3 mths-17 years
Peer relations/problems P:PedsQL-TS  P:SDQ
 P:AQoL-4D P P:AQoL-4D P
Sibling/family relations  P:PedsQL-FIM Fam  P:PedsQL-FIM Fam  P:PedsQL-FIM Fam  P:PedsQL-FIM Fam  P:PedsQL-FIM Fam P:AQoL-4D P P:AQoL-4D P
Interpersonal relationships   P:CRISIS P C
Parent-child relations   P:CRISIS P C
Intimate/romantic relations   P:CRISIS P
Relationship satisfaction   P:CRISIS P

Featured measurements

AQoL-4D: Assessment of Quality of Life – 4D
CRISIS: CoRonavIruS Health Impact Survey (various instruments)
PedsQL-4.0: Pediatric Quality of Life Inventory – 4.0 Generic Core Scales
PedsQL-FIM: Pediatric Quality of Life Inventory – Family Impact Module
PedsQL-TS: Pediatric Quality of Life Inventory – Toddler (2-4 years) Scale
PedsQL-W: Pediatric Quality of Life Inventory – General Well-Being Scale
SDQ: Strengths and Difficulties Questionnaire


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)