Table 2: Selected datasets included in the Kent Integrated Dataset.

Dataset	Source system	Linkage	Example variables
Primary care (general practices)	EMIS and Vision clinical computing systems	NHS number	The site of consultation (surgery, home or telephone) Clinical information; including diagnoses, diagnostic tests and results, vaccinations, prescriptions, referrals, records of risk factors (such as alcohol, tobacco and blood pressure) Staff type (‘doctor’ or ‘other’) GP practice code (can be linked to practice characteristics)
Social care (Kent County Council)	SWIFT	NHS number (available for 94% of cases)	Care package type Client category type (e.g. ‘Adult Learning Disability’)
Secondary Care (Acute NHS Trusts located in Kent)	Secondary Uses Service	NHS number	HS number Length of admission Discharge location Causes of admission (using ICD-10 diagnoses) Type of procedure (such as operation) received, if relevant
Community health services (Kent Community Health NHS Foundation Trust)	CIS	NHS number	Type of service provided Description of treatment received Referral source Type of service provided A classification of mental health need, based on severity and type of mental health problems(12)
Mental health (Kent and Medway NHS and Social Care Partnership Trust)	Servelec RiO	NHS number	Type of service provided A classification of mental health need, based on severity and type of mental health problems(12)
Out of hours (IC24)	CLEO	NHS number	Location of consultation (phone, walk-in centre, home visit) Outcome (e.g. GP referral, hospital episode)
Population register	Derived from other datasets	NHS number	Age Sex LSOA of residence Index of Multiple Deprivation decile(13) of LSOA of residence Commercial geodemographic segmentation at household level: Mosaic and ACORN Pseudonymised Unique Property Reference Number, allowing members of the same household to be linked