NHS Wales datasets

Last modified: 08 Jul 2024

Introduction

Data from NHS Wales will soon be available in the UK LLC TRE - see details of the 17 datasets in Table 1.

Although NHS Wales is not the owner of all the datasets (acting as data controller or data processor on behalf of the owner for some), for ease, we refer to all the datasets in these guides as NHS Wales datasets.

Note: Each LPS participant has the power to opt out of linkage to their NHS Wales records.

UK LLC documentation of NHS Wales datasets

We have organised our NHS Wales data documentation into four tiers as explained in Figure 1. This initial guide provides an overview of the NHS Wales datasets held in the UK LLC TRE. The Processing and linkage guide will explain how LPS participants are linked to their health records and how they can opt out. The Coded variables guide will detail the various classification systems used in NHS Wales datasets. The five overview dataset guides align with the dataset primary domains in Table 1 and provide an introduction to the hospital datasets, the COVID datasets, the registration datasets, the primary care dataset and the ‘other’ datasets, which is a collection of datasets that do not fit neatly into one of the other four groups. Finally, there is a series of more detailed individual dataset guides.

Figure 1 UK LLC documentation of the NHS Wales datasets is across four tiers, starting with this overview and culminating in the individual dataset guides

Overview of NHS Wales datasets

The NHS Wales datasets cover a variety of domains and time periods as summarised in Table 1. Their geographic coverage is restricted to Wales, apart from ADDE. The UK LLC Data Team does not change the names of the datasets when they are ingested to the UK LLC TRE.

Table 1 Names, temporal coverage and availability of NHS Wales datasets in the UK LLC TRE (the datasets in italics are retired)

Dataset name in TRE	Full dataset name	Primary domain	Secondary domain	Data available in TRE1	Data owner
PEDW	Patient Episode Dataset for Wales	Hospital	Admitted patients	TBC	NHSW
OPDW	Outpatient Database for Wales	Hospital	Outpatients	TBC	NHSW
EDDS	Emergency Department Dataset	Hospital	A & E patients	TBC	NHSW
CCDS	Critical Care Dataset	Hospital	Critical care patients	TBC	NHSW
ICNC	Intensive Care National Audit and Research Centre	Hospital	Critical care patients	TBC	NHSW
PATD	COVID-19 Test Results	COVID	Testing	TBC	NHSW
CTTP	COVID-19 Test Trace and Protect	COVID	Testing & tracing	TBC	NHSW
CVSP	COVID-19 Shielded People List	COVID	Shielding	TBC	NHSW
CVVD	Covid Vaccination Dataset	COVID	Vaccination	TBC	NHSW
WCISU	Welsh Cancer Intelligence and Surveillance Unit	Registration	Cancer	TBC	NHSW
WDSD	Welsh Demographic Service Dataset	Registration	Demographics	TBC	NHSW
ADDE	Annual District Death Extract	Registration	Deaths	TBC	ONS
WLGP	Welsh Longitudinal General Practice Dataset	Primary care		TBC	NHSW
OPRD	Outpatient Referral	Other	Outpatients	TBC	NHSW
MIDS	Maternity Indicators Dataset	Other	Maternity	TBC	NHSW
WASD	Welsh Ambulance Services NHS Trust	Other	Ambulance calls	TBC	NHSW
NHSO	NHS 111 Dataset	Other	NHS 111 calls	TBC	NHSW

¹As documented in the data sharing agreement.
NHSW: NHS Wales; ONS: Office for National Statistics