subsample, selected from the past 6 months of ALSPAC births, who were invited to the first four ‘Children in Focus’ (CiF) study assessment clinics. ‘Early childhood’ included 11 MCQs, 6 CCQs and the CiF subsample who were invited to a further 6 clinical assessments. ‘Childhood’ included the first focus (‘Focus@7’) study assessment clinic and one CCQ. ‘Late childhood’ included six MCQs, nine CCQs and four ‘Focus’ clinics. ‘Adolescence’ included three MCQs, seven CCQs and two ‘Focus’ clinics and finally ‘transition to adulthood’ included one MCQ, two CCQs and the latest clinic assessment visit (‘Focus@17’). The enrolled sample was increased in ‘childhood’ through recruitment Phase II, and recruitment Phase III ran from ‘late childhood’ through ‘transition to adulthood’ inclusive.
