Samples of Anonymised Records from the 2001 Census Five different microdata files - with varying amounts of detail Three different modes of access - with.

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Presentation transcript:

Samples of Anonymised Records from the 2001 Census Five different microdata files - with varying amounts of detail Three different modes of access - with level of security related to the level of detail in the data

Individual SAR 3% sample of individuals from UK 1.76 million records All census variables present Lowest geography – GOR Access End User Licence (via Athens for academics -Do not attempt to identify anyone -Do not pass on data to unregistered individual

Controlled Access Individual SAR 3% sample of individuals from UK 1.76 million records All census variables present with very great detail Lowest geography – LA Access Only within 4 ONS offices Rigorous application procedure by ONS Careful vetting of outputs by ONS

Household SAR 1% sample of households, E & W only 225K Households; 525K individuals All census variables present No geography Individuals linked within household Access Special Licence - administered by UKDA -More restrictive than EUL, eg cannot use on laptop -Applications need approval by ONS

Controlled Access Household SAR Same sample as SL-Household SAR, but also contains Scotland and NI All census variables present with very great detail Lowest geography – LA Access Only within 4 ONS offices Rigorous application procedure by ONS Careful vetting of outputs by ONS

Small Area Microdata (SAM) 5% sample of Individuals from UK 2.96 million records Most census variables present – restricted detail Lowest geography – LA Access End User Licence (via Athens for academics) -Do not attempt to identify anyone -Do not pass on data to unregistered individual