ELAN data

The data research infrastructure allows researchers to investigate the current and past states of health affairs in the region Haaglanden and Hollands Midden, while also enabling the development of exploratory and predictive models using the available data as input. With its extensive data sets the ELAN research infrastructure serves as an ideal platform for conducting a wide range of studies, including both clinical and societal research.

Our (overarching) goal is to contribute to healthcare reform, innovation and the improvement of health and well-being for residents in the Haaglanden and Hollands-Midden regions. As a consequence all data-requests must comply with the following:

The datasets are accessible for researchers in two separate data environments:

The internal LUMC environment (I-Drive): hosted on the secure servers of LUMC (only GP-data).
The external CBS-RA environment: hosted on the servers of the Statistics Netherlands (CBS).

Each infrastructure has unique advantages and limitations. For a detailed comparision, visit the data environments overview.

Data Sources and Coverage

In the CBS-RA environment, CBS securely links data from multiple sources at the individual level, using a pseudonymized identifier. Only aggregate results are allowed to be exported, to minimize the risk of re-identification of individuals. The table below provides an overview of the available data sources and their populations.

Datasets are only available following approval by the dataholders, as can be found here (for communication with dataholders, see ‘bijlage 2’).

Type of data	Source(s)	Population
Primary care health data	General Practitioners	patients in the ELAN region
Data from Statistics Netherlands	Statistics Netherlands	the Netherlands
Health Insurance data	Vektis	the Netherlands
Patient health data	Hospitals	patients from the hospitals HagaZiekenhuis or HMC
Acute and chronical care data	Hadoks	patients in Haaglanden
Mental health data	Parnassia	patients in Haaglanden
Perinatal data	Perined	patients in the Netherlands
Covid-19	GGD Haaglanden	patients in Haaglanden
WMO data	Municipality of The Hague	citizens of The Hague
Cardiovascular data	Hospital	patients from the Reinier de Graaf hospital
Your own data	You	A population with an overlap to any of the sources above

For a detailed statistical overview of the data sets, including key insights and research potential, refer to this article.

By combining comprehensive datasets with secure linkage capabilities, ELAN enables cutting-edge research that bridges the gap between clinical outcomes and societal health determinants.