Version: 1.0.0 | Published: 3 Feb 2026 | Updated: 25 days ago
Documentation
Description:
The BiW OMOP CDM database contains longitudinal routinely-collected health records (EHR data) from UK primary and secondary care practices. The data has been transformed into a common format (data model) using an open community data standard and structure from the OHDSI standardised vocabularies.
Coverage
Spatial:
Wales
Typical Age Range:
0-150
Follow Up:
Continuous
Pathway:
Common Data Model comprising of Primary Care and secondary care, specific
maternity/birth records, and Linked Data.
Provenance
Origin
Purposes:
Research cohort
Sources:
EPR
Collection Situations:
Other
Temporal
Accrual Periodicity:
Biannual
Distribution Release Date:
12 February 2026
Start Date:
01 January 2000
Time Lag:
2-6 months
Accessibility
Access
Access Rights:
Access Service:
Data is access is currently controlled by the MIREDA partnership and can only be
accessed by the partnership's analysts who can work with researcher to compile
analysis scripts and provide analysis outputs to approved projects and
researchers.
Delivery Lead Time:
2-6 months
Jurisdictions:
UK
Data Controller:
MIREDA
Data Processor:
MIREDA
Usage
Data Use Limitations:
Research use only
Data Use Requirements:
- Collaboration required
- Project-specific restrictions
- Publication required
- Disclosure control
Resource Creators:
The MIREDA Partnership
Format and Standards
Vocabulary Encoding Schemes:
- LOCAL
- OPCS4
- READ
- NHS WALES NATIONAL CODES
- ICD10
Conforms To:
OMOP
Languages:
en
Formats:
csv
Observations
Statistical Population
Population Description
Population Size
Measured Property
Observation Date
Persons
There are a total of 1,215,635 persons in the dataset but the data refers to 777,627 babies and 438,008 Mothers with crossover between babies who later also become mothers.
1215635
Count
01 November 2024