Schema

Raw Schema

Column Name	Data Type	Description	Example
_ingest_time	varchar	Ingest timestamp	’2026-04-10T12:00:00Z’
pseudo_registration_guid	varchar	Hashed registration identifier	’reg-98765’
pseudo_patient_id	varchar	Hashed patient identifier	’pat-54321’
emis_registration_organisation_guid	varchar	Organisation identifier	’org-11223’
emis_usualgp_userinrole_guid	varchar	Usual GP user-in-role identifier	’auth-45678’
gender	varchar	Patient gender (M / F / I / U)	‘F’
ethnic_category_snomed_concept_id	bigint	Ethnicity SNOMED concept identifier	186019001
ethnicity_emis_code_id	varchar	EMIS ethnicity code identifier	’code-77777’
date_of_birth	varchar	Year and month of birth (YYYY-MM)	‘1985-06’
date_of_death	date	Date of death where recorded	’2025-01-01’
registration_date	date	Date of registration	’2010-03-15’
pseudo_nhs_no	varchar	Hashed NHS number	’nhs-hashed-99999’
emis_no	varchar	EMIS patient number	’12345’
emis_registration_type_description	varchar	Registration type	’GMS’
dummy_patient_flag	boolean	Indicates a dummy/test patient	false
number_and_street	varchar	Street address	’10 Main Street’
postcode	varchar	Postcode	’AB1 2CD’
address_guid	varchar	Address identifier	’addr-11111’
exa_household_key	varchar	Household key for linkage	’hh-22222’
residential_institute_code	boolean	Whether a residential institute code is present	false
nhs_number_status	varchar	NHS number status	’Verified’
pseudo_person_guid	varchar	Hashed person GUID	’person-hashed-33333’
legacy_pseudo_person_guid	varchar	Hashed legacy person GUID	’person-hashed-33333’
registration_end_date	date	Date registration ended	’2026-01-01’
imd_decile	integer	Index of Multiple Deprivation decile	3
sensitive_patient_flag	boolean	Sensitivity indicator	false
confidential_patient_flag	boolean	Confidentiality indicator	false
email_flag	boolean	Whether an email address is present	true
mobile_number_flag	boolean	Whether a mobile number is present	true
home_phone_number_flag	boolean	Whether a home phone number is present	false
carer_name_flag	boolean	Whether a carer name is present	false
carer_relation_flag	boolean	Whether a carer relation is present	false
external_usualgp_guid	varchar	External usual GP GUID	’ext-gp-44444’
_execution_date	varchar	Extract execution date	’2026-04-10’
organisation	varchar	Organisation identifier	’CDB-0001’
study_id	varchar	Study identifier from included patients view	’study-12345’