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
Coping skills  P:CISSM F/P
Social responsiveness  T:SRS
Social support P:SDV P:SSQM F/P
Social risk P:SDV 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 Derived Variable
CISS: Coping Inventory for Stressful Situations
SRS: Social Responsiveness Scale
SSQ: Social Support Questionnaire