Year 2001-2003 2001-2003 2003-2005 2006-2008 2008-2010
Wave 1 1 2 3 4
Age full term preterm 2 years CA 5 years CA 7 years CA
Date of Birth  P:SDV  P:SDV
Education level  P:SDVM F/P  P:SDVM F/P P:SDVM F/P
Employment P:SDVM F/P P:SDVM F/P P:SDVM F/P
Ethnicity P:SDVM F/P P:SDVM F/P
Income P:SDV P:SDV
Language spoken at home P:SDV P:SDV
Living arrangements P:SDVM C S P:SDVC P:SDVM F/P C 
Family structure P:SDV P:SDV
Marital/relationship status P:SDVM F/P P:SDVM F/P
Occupation P:SDVM F/P P:SDVM F/P P:SDVM F/P
Siblings P:SDV P:SDV
Sex P:SDV P:SDV P:SDV

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)