Every person who is registered with a General Prac-titioner (GP) in Scotland is allocated a 10-digit unique patient identifying number called a Community Health Index (CHI) number.
DESCRIPTION OF THE DATABASE
Every
person who is registered with a General Prac-titioner (GP) in Scotland is
allocated a 10-digit unique patient identifying number called a Community
Health Index (CHI) number. The CHI database contains additional demographic
information such as patient’s address (including postal code), GP registered
with, and date of death (if applicable). For practical purposes, the entire
Tayside popula-tion is registered with a GP and thus appears in the central
computerised records of the Community Health Master Patient Index. Once patients
are allo-cated a CHI number it is never re-allocated so record-linkage of
medical data over a large number of years is possible.
The CHI number is used as the patient identifier for all
healthcare activities in primary and secondary care in Tayside. The
patient-specific number allows for efficient linkage of records of patient
activity and outcome.
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