Year 2011-2012 2011-2012 2011-2012 2011-2012 2011-2012 2011-2012
Wave 1 2 3 4 5 6
Time point baseline 0-3 months age + 7 days age + 14 days age + 21 days age + 28 days 6 months
Breathing difficulties / wheezing P:PedsQL-IS C
Asthma P:SDV M F S
Hay fever P:SDV M F S
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: GrandparentSDV: Study Devised Variable
PedsQL-IS: Pediatric Quality of Life – Infant Scales