Your information can help in improving the way we care for you.

Care and Health Information Analytics (CHIA) is a database used for analysing trends in population health in order to identify better ways of treating patients. This is called ‘Secondary Processing’.


CHIA is a physically separate database, which receives some data from CHIE. Prior to this transfer from CHIE to CHIA patient identifiers are removed from the data. This includes names, initials, addresses, dates of birth and postcodes. NHS numbers are encrypted in the extract and cannot be read. This process is called ‘pseudonymisation’.  This subset of data does not include information typed in by hand, so there is no possibility of it containing references to family members or other people. It contains only coded entries for things like allergies and prescribed drugs. It is not possible to identify any patient by looking at the ‘pseudonymised’ data on the CHIA database.


People who have access to CHIA do not have access to CHIE.

Data in CHIA is used to plan how health and care services will be delivered in future, based on what types of diseases are being recorded and how many are being referred to hospital etc.   Data is also used to help research into new treatments for diseases. Examples of how this has helped patients with diabetes, acute kidney injury etc. can be found here.


Data in CHIA is never shared with commercial companies like drug manufacturers.