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SINGLE CODE ONLY. READ OUT, ALLOW DK AND REF BUT DO NOT READ OUT.
Universe
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
Study Type
Longitudinal/panel/cohort; Five waves have been conducted to date: MCS1 (age 9 months), MCS2 (age 3 years), MCS3 (age 5 years), MCS4 (age 7 years) and MCS5 (age 11 years).