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All persons normally resident in private households in Great Britain and (from 1994) Northern Ireland.;National
Sampling
Simple random sample;Four sampling frames are used. For Great Britain, south of the Caledonian Canal, the Post Office Address File is used, whilst north of the Caledonian Canal, a random sample is drawn from the published telephone directory. The sample of residents in NHS accommodation is also drawn, unclustered, for the whole of Great Britain using a specially-prepared frame. In Northern Ireland, the source of the sample is the Valuation List used for rating purposes, excluding commercial units and known institutions. Households are interviewed on five occasions at quarterly intervals, thereby introducing a panel element to the survey. For further details see documentation.
Study Type
Repeated cross-sectional study. Data are collected quarterly.
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