Year ≥ 2011 ≥ 2012 ≥ 2014
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)
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
Hearing impairment  P:SDVC S  P:SDVC  P:SDVC  P:SDVC  P:SDVC   P:SDVC  S  P:AQoL-4DR  P:AQoL-4DR
Hearing aid P:SDVC  P:SDVC  P:SDVC  P:SDVC  P:SDVC 
Cochlear implant P:SDVC  P:SDVC  P:SDVC  P:SDVC  P:SDVC 
Hearing device use P:SDVC 
Family history of hearing loss or
associated syndromes
P:SDVFAM P:SDVFAM
Functional listening P:CHILD
O:LiSN-S
P:PEACH
P:PEACH

Featured measurements

AQoL-4D: Assessment of Quality of Life – 4D
CHILD: Children's Home Inventory for Listening Difficulties
LiSN-S: Listening in Spatialized Noise – Sentences test
PEACH: Parents' Evaluation of Aural/oral performance of CHildren

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)