​​Definition of data types​

This section provides definitions for key terms which are used throughout the text below to describe different data types. ​
Anonymised data, which is data about you but from which you cannot be personally identified

De-identified data with pseudonym identifier, which is data about you but we are able to track you through the patient pathway without using your personal information, and you cannot be personally identified.

De-identified data with weak pseudonym identifier such as the NHS number. We use this to link two or more types of datasets together using your NHS number. For example, using your NHS number to link and analyse datasets such as acute data with community data to see the full picture of your patient pathway. No other personal information is used during this process and you will not be personally identified. However, there may be times whereby you may be re-identified in the event of patient safety requirements, or re-identified for direct care purposes where we pass on information to your GP to treat you

Anonymised in Context data (for commissioning purposes), which is de-identified data about you but from which you cannot be personally identified within a commissioning (CCG) environment. You may be personally identified if this data was available to a hospital or your GP.  Like the above, we replace the NHS number with a locally generated pseudonym like hospital number; 

Personal data, information from which you can be personally identified, for example name, address, postcode, date of birth
Sensitive personal data, information about your physical and mental health from which you can be identified