Self defined ethnicity
Self defined ethnicity (SDE) codes are a set of codes used by the Home Office in the United Kingdom to classify an individual's ethnicity according to that person's self-definition.
The codes are also called "18 + 1" codes, as there are 18 of them, plus one code (NS) for "not stated".[1]
The code system originated in the United Kingdom Census 2001.
British police forces are required to use the SDE 18+1 codes (as opposed to the commonly used radio shorthand IC codes) when spoken contact has taken place and an individual has been given an opportunity to state their self-perceived ethnicity.
List of SDE codes
- W1 – British
- W2 – Irish
- W3 – Gypsy or Irish Traveller
- W9 – Any other White background
- Mixed or Multiple ethnic groups
- M1 – White and Black Caribbean
- M2 – White and Black African
- M3 – White and Asian
- M9 – Any other Mixed or Multiple background
- A1 – Indian
- A2 – Pakistani
- A3 – Bangladeshi
- A4 – Chinese
- A9 – Any other Asian background
- Other ethnic groups
- O2 – Arab
- O9 – Any other ethnic group
- Not stated
- NS – Not Stated.
References
- "Criminal Justice System Exchange Data Standards Catalogue, Version 6" (PDF). GOV.UK. HM Government. Retrieved 16 July 2021.
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