Four Dimensional Complaints List 4DKL


  • Start your study or care program Four Dimensional Complaints List 4DKL
  • Invite patients within minutes
  • Increase response rate by up to 6 times with the Improve app.
  • Receive data in any preferred format like CSV/XLS and pdf or use our API’s to integrate data directly into your EHR or CRF system using international standards for medical data.
  • Highly secure, using end-to-end encryption
  • The Improve applications are exclusively designed and available for medical professionals and researchers

Are you a healthcare professional or researcher and want to send to 20 patients or participants this questionnaire for free? Then sign up in our web portal and send this questionnaire. Your patients or participants will answer the questions via the mobile app, to ensure privacy.

If you want to start with more than 20 patients or participants ask for the offer.


The Four Dimensional Complaints Questionnaire (4DSQ) is a useful questionnaire that can help the doctor determine whether these patients require further treatment, and if so, which. The physician uses the 4DSQ to distinguish psychosocial symptoms from depressive and anxiety disorders, to quantify the severity of the suffering, to identify somatisation symptoms, and to monitor the course of the problems. After a patient has filled in the 4DSQ, the doctor and the patient can jointly discuss the results and, if necessary, formulate a ‘diagnosis’ and an action plan. The 4DSQ measures four dimensions of psychological complaints: distress, depression, anxiety and somatisation. Distress is a non-specific measure of the severity of psychological suffering, depression and anxiety are specific symptoms of major depressive and anxiety disorders, and somatisation stands for experiencing physical symptoms of tension and the tendency to be anxious about them. Virtually the entire range of psychological and psychosomatic complaints can be categorised in these four dimensions.

Translated with (free version)

Create ePRO’s, modules, and programs

Create your own PROMs in Improve Designer, schedule them in time or on a predefined condition, and make them available to individual, or groups of, patients. Or, select any of the over 400 validated digital PROMs or 30 complete modules from the Improve Library to start inviting you patients or research population within minutes.

Increase patient/participant engagement

The user-friendly Improve Mobile App helps to increase the response rate by up to 6 times. Features such as conditional follow-up questions, personal care programs, and helpful reminders help to increase patient engagement.


The platform utilizes highly secure end-to-end encryption methods, is GDPR compliant, and is ISO 27001 certified.

Additional information