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Revisions

HSE statistics revision policy

The Code of Practice for Official Statistics requires all producers of Official Statistics to publish a policy on revisions.

HSE aims to avoid the need for large revisions to National Statistics unless absolutely necessary and has procedures in place to minimise the number and scale of any revisions made. Where any changes to previously published data come to the attention of HSE statisticians, they will form a professional view as to whether a revision to published data is in the public interest. If necessary, the HSE chief statistician will seek further advice from the National Statistician's office.

There are four key reasons why revisions may be necessary:

1. A change in data collection method or a methodological improvement

2. Revisions in population data used to calculate rates or weights for survey data

3. Receipt of late or revised data from a supplier

4. Errors in our statistical systems and processes

Further information

Updated 2017-10-24