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Danish Depression Database


Primary variables


Death during admission

Death within 30 days of discharge


Hamilton score


Suicide risk

Treating hospital /department


The Danish Depression Database (DDD) is a national clinical quality database for monitoring and improving the quality of treatment and care for all patients admitted to or associated with hospital psychiatric units in Denmark. The database collates data on patients who are either admitted to or are in outpatient contact with hospital psychiatric services.

All units in Denmark undertaking primary treatment and monitoring of patients with depression, such as hospital departments, outpatients or district psychiatric services have been covered since 1 January 2011 by the requirement to report data to the Danish Depression Database by notifying SKS codes to the National Patient Register (LPR). The database has been operating nationally since 1 January 2011.

More details

Nationwide clinical quality database
Clinical quality

Collection Period

Collection Period
The population consists of all patients aged over 18 with permanent residence in Denmark diagnosed with depression, including patients with previous episodes of depression and new cases
Database Categories

Application requirements

The Regional Clinical Quality Databases

Data about clinical quality are collected with the purpose of monitoring and raising the quality of patient treatment in the Danish health-care system. These data can, as well as all other public registers, be made accessible for research projects based on systematic protocols and approved according to the relevant legislations.

Applying for access to data from a regional clinical database requires a list of demands to be obtained. A project description should be attached containing a description of the project explaining the rationale, purpose, methods, budget, publication plan etc.

Furthermore, The Danish Data Protection Agency must approve the project.

Application process

  • Apply via research access (Danish: forskeradgang), an online application system
  • Submit the protocol to The Danish Clinical Registries (RKKP)
  • RKKP registers the application
  • The application is forwarded to the relevant clinical database
  • Potential dialog about adjustment to the protocol
  • Approval and extradition of data (expected 6 months after application)



The Regional clinical quality databases subject to rules for treatment of personal data, that should secure high quality of patient treatment in Denmark. These legislations include The Act on Processing of Personal Data (Danish: Persondataloven) and The Danish Act of Health (Danish: Sundhedloven). These legislations ensure that data access is limited to relevant purposes.

Contact information

Data owner
Central Denmark Region
Contact data owner
Regionshuset Viborg
Skottenborg 26
8800 Viborg 
Website - data owner
Data administrator
The Danish Clinical Registries (RKKP)
Contact data administrator
Lea Grey Haller
T: 21 52 59 08
Website - data administrator