Evidence base for claim made in Chief Statistician's guidance on sex and gender data

The request was successful.

Dear Scottish Government,

In the Chief Statistician's 'Data collection and publication guidance on Sex, Gender Identity and Trans Status' (published 22 September 2021), it states:

"For the vast majority of people, questions on someone’s sex and gender identity will
provide the same response: female and woman/girl, or male and man/boy."

Please provide details of the evidence that supports this claim. In responding, please indicate the methodology for the statistical analysis which substantiates this claim, e.g. the sample size, method of selection of sample, whether it was representative of the Scottish population and so on.

Yours faithfully,

J MacIver

Scottish Government

Our Reference: 202100241790
Your Reference: Evidence base for claim made in Chief Statistician's
guidance on sex and gender data

Dear J MacIver,

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Yours sincerely
MiCase
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Scottish Government

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Please find attached a response to your correspondence.
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This e-mail (and any files or other attachments transmitted with it) is
intended solely for the attention of the addressee(s). Unauthorised use,
disclosure, storage, copying or distribution of any part of this e-mail is
not permitted. If you are not the intended recipient please destroy the
email, remove any copies from your system and inform the sender
immediately by return.
Communications with the Scottish Government may be monitored or recorded
in order to secure the effective operation of the system and for other
lawful purposes. The views or opinions contained within this e-mail may
not necessarily reflect those of the Scottish Government.
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