AcknowledgementsWe are grateful for the co-operation of the Millennium Cohort Study families who voluntarily participate in the study. We thank the Economic and Social Research Council and the co-funding by a consortium of UK government departments for funding the Millennium Cohort Study through the Centre for Longitudinal Studies (CLS) at the UCL Institute of Education, London.We would also like to thank a large number of stakeholders from academic, policy-maker and funder communities and colleagues at CLS involved in data collection and management. The funders of the study had no role in study design, data collection, data analysis, data interpretation, or writing of this paper.
AbstractPurpose: Investigate the (1) longitudinal changes and sex differences in mental ill-health and wellbeing from ages 11 to 14, (2) predictors of changes in mental health outcomes, and (3) sex and reporter differences in these predictors.Method: Data from 9553 participants in the Millennium Cohort Study, with both mental illhealth (parent-and self-report) and wellbeing outcomes of the cohort members measured at ages 11 and 14. A range of childhood socio-demographic, human capital, family and wider environment risk and protective factors are investigated.