beta.core schema

Available on backends: TPP, EMIS

This schema defines the core tables and columns which should be available in any backend providing primary care data, allowing dataset definitions written using this schema to run across multiple backends.

Warning

This schema is still a work-in-progress while the EMIS backend remains under development. Projects requiring EMIS data should continue to use the Cohort Extractor tool.

To use this schema in an ehrQL file:

from ehrql.tables.beta.core import (
    clinical_events,
    medications,
    ons_deaths,
    patients,
)

many rows per patient

clinical_events

Columns

date date

snomedct_code SNOMED-CT code

numeric_value float

many rows per patient

medications

Columns

date date

dmd_code dm+d code

many rows per patient

ons_deaths

Columns

date date

place string

• Possible values: Care Home, Elsewhere, Home, Hospice, Hospital, Other communal establishment

cause_of_death_01 ICD-10 code

cause_of_death_02 ICD-10 code

cause_of_death_03 ICD-10 code

cause_of_death_04 ICD-10 code

cause_of_death_05 ICD-10 code

cause_of_death_06 ICD-10 code

cause_of_death_07 ICD-10 code

cause_of_death_08 ICD-10 code

cause_of_death_09 ICD-10 code

cause_of_death_10 ICD-10 code

cause_of_death_11 ICD-10 code

cause_of_death_12 ICD-10 code

cause_of_death_13 ICD-10 code

cause_of_death_14 ICD-10 code

cause_of_death_15 ICD-10 code

one row per patient

patients

Columns

date_of_birth date

Patient's date of birth, rounded to first of month.

• Always the first day of a month
• Never NULL

sex string

Patient's sex.

• Possible values: female, male, intersex, unknown
• Never NULL

date_of_death date

Patient's date of death.

Methods

age_on(date)

Patient's age as an integer, in whole elapsed calendar years, as it would be on the supplied date.

Note that this takes no account of whether the patient is alive at the given date. In particular, it may return negative values if the date is before the patient's date of birth.

View method definition

return (date - patients.date_of_birth).years