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The sample population for MCS was drawn from all live births in the United Kingdom over 12 months (from 1 September 2000 in England and Wales and for 59 weeks from 22 November 2000 in Scotland and Northern Ireland).;National
Sampling
Multi-stage stratified random sample;See documentation for details.
Study Type
Longitudinal/panel/cohort<br><br>Four waves have been conducted to date: MCS1 (age 9 months), MCS2 (age 3 years), MCS3 (age 5 years) and MCS4 (age 7 years).<br><br>The population of eligible live births was selected from a random sample of electoral wards, disproportionately stratified to ensure adequate representation of all four UK countries, deprived areas and those with high concentrations of black and Asian families. See documentation for further details.