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
Speech  O:K-SEALS
Language assessment O:CELF-4

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

CELF-4: Clinical Evaluation of Language Fundamentals – Fourth Edition
K-SEALS: Kaufman Survey of Early Academic and Language Skills