Millennium Cohort Study (MCS)Jump to Mental Health Measures
The Millennium Cohort Study (MCS) is a national longitudinal birth cohort study following the lives of around 19,000 young people born in the United Kingdom in 2000-01. This multidisciplinary survey aims to capture the influence of early family context on child development and outcomes. Children from minority ethnic backgrounds and children in Scotland, Wales & Northern Ireland are oversampled to help capture the diversity of backgrounds into which children are born in the beginning of the 21st century.
Centre for Longitudinal Studies (CLS) - Institute of Education (IoE), UCL
United Kingdom (England, Scotland, Wales, Northern Ireland)
Children born between September 2000 and January 2002. The sample was selected from a random sample of electoral wards, disproportionately stratified to ensure adequate representation of all four UK countries, deprived areas and areas with high concentrations of Black and Asian families.
An additional 692 families who were eligible for MCS1 but weren't picked up by the child benefit system were recruited at the age 3 survey.
Sample size at recruitment
Sample size at most recent sweep
11,726 children (MCS6)
Age at recruitment
Cohort year of birth
UK Data Service
Genetic data collected
Linkage to administrative data
Birth and perinatal period, cognitive measures, education, ethnicity and race, genetic data, income and socioeconomic status, personality measures, COVID
Also known as Child of the New Century
Connelly R & Platt, L. (2014) Cohort Profile: UK Millennium Cohort Study (MCS). International Journal of Epidemiology, 43, 1719-1725.
Joshi H & Fitzsimmons E. (2016) The Millennium Cohort Study: the making of a multi-purpose resource for social science and policy. Longitudinal and Life Course Studies, 7, 409-430.