Wave 1 2 2a 3 4 5 6 7 8/11/13 9/12/14 10 15 16
Age baseline
(10-20 weeks gest)
30-32 weeks gest
(index child)
medical records data abstraction 3 months postpartum
(index child)
6 months postpartum
(index child)
9 months postpartum
(index child)
12 months postpartum
(index child)
18 months postpartum
(index child)
6 months postpartum
(2nd/3rd/4th child)
12 months postpartum
(2nd/3rd/4th child)
4 years postpartum
(index child)
10 years postpartum
(index child)
11 years postpartum
(index child)
Tobacco S:SDV S:SDV A S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV S:SDV
P – parent report (mother reporting on children)
S – self report (mother reporting on herself)
A – medical records data abstraction
O – observation/direct assessment
XC – Pertaining to index child
XM – Pertaining to mother
XF/P – Pertaining to father/partner
XS – Pertaining to siblingSDV: Study Devised Variable