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Danish Quality Database for Hysterectomy and Hysteroscopy


Primary variables

Alcohol consumption


Antithrombotic treatment






Intraoperative bleeding

Menopause status

Operation - data

Operation - techniques

Placental weight

SKS operation code


Supplementary operation



The Danish Quality Database for Hysterectomy and Hysteroscopy (DHHD) is a clinical quality database containing information about women who have hysterectomies due to a benign condition such as dysmenorrhoea (heavy bleeding or muscle cramps) or who have had a hysteroscopic examination of the uterus. Women whose uterus has been removed due to cancer are not included in the database.

DHHDs purpose is to elucidate the quality of the health service's provision. Monitoring these interventions provides markers for the overall surgical quality of gynaecology services since the techniques cover the methods used for the whole specialism. Based on data from the National Patient Register, the database has been operating nationally since 2011.

More details

Nationwide clinical quality database
Clinical quality

Collection Period

Collection Period
The population consists of elective hysterectomy and hysterescopy operations undertaken for benign indications. The maximum allowed is one hysterectomy intervention per woman and in the event of several registered operations, select the first. A woman may have multiple hysteresecopic examinations but only the first intervention is included, as is hysteroscopy with removal of the endometrium or intracavital fibroma or endometrial excision. All acute, diagnostic and malignant hysteroscopies are excluded
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
The Capital Region of Denmark
Contact data owner
Kongens vænge 2
3400 Hillerød
Website - data owner
Data administrator
The Danish Clinical Registries (RKKP)
Contact data administrator
Thor Schmidt
T: 29 64 69 57
Website - data administrator