Primary Care GP dataset

Data Providing Organisation:
Welsh General Practices that have signed up to SAIL

Data Providing Type:
Clinical system data



Each GP practice uses a clinical information system to maintain an electronic health record for each of their patients; capturing the signs, symptoms, test results, diagnoses, prescribed treatment, referrals for specialist treatment and social aspects relating to the patients home environment.

Data Collection Method

The majority of the data is entered by the clinician during the patient consultation. Test results are electronically transferred from secondary care systems.

Data Highlights

There are no standard rules for recording data within primary care clinical information systems. Therefore, each individual clinician can record information in their own way. The majority use Read Code Terminology, however, sometimes this is applied behind the scenes by the clinical system and sometimes local codes are used. Read codes are not as precise as ICD 10 or OPCS codes.

Coding standards have been agreed on for conditions monitored by the QOF (Quality Outcomes Framework) returns. Since the implementation of QOF these conditions have been coded in a more consistent way.

Time coverage varies between each practice.

Access Requirements

As a core SAIL dataset available in accordance with our standard Information Governance procedure.

More Information

The data is securely extracted from the clinical system using the SAIL module in Audit+.


Average around 5000 but ranging from 1000 up to around 30,000; depending on the contributing practice

Data Level

Individual person

Data Years

January 2000 to October 2014 (approx. as varies by practices)

SAIL Schema