Year 2011-2015 2011-2015
Wave Whole cohort Clinical sub-sample
Age 10-14 years 10-14 years
Pubertal stage S:PDS-C
Puberty onset S:PDS-C
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

PDS-C: Pubertal Development Scale – Carskadon and Acebo adaptation