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
Blood pressure O:SDV O:SDV
Cerebral Palsy O:SDV O:SDV
Hearing impairment O:SDV O:SDV
Hospitalisation P:SDV P:SDV
Illness/disease (e.g. asthma, croup) P:SDV P:SDV
Interventions/therapy (inc. history, e.g. physio, speech pathology) P:SDV P:SDV P:SDV
Medical exam O:SDV O:SDV
Surgery P:SDV P:SDV
Visual impairment O/P:SDV O/P:SDV
CA = Corrected age for prematurity

S – self report
P – parent report
C – child report
T – teacher report
N – welfare nurse
O – observation

XM: Mother
XF/P: Father/partner
XC: Child
XS: Sibling
XG: Grandparent

SDV: Study Devised Variable