Very Low Disease Activity (VLDA) Index for PsA

The very low disease activity index is related to the minimal disease activity index and is a tool for measuring disease state in psoriatic arthritis. It is a composite index comprising seven domains: tender joint count, swollen joint count, psoriasis activity or extent, a functional index (HAQ), enthesitis and two patient completed visual analogue scores, one for pain and one for global disease activity. If all 7 criteria are met then the patient is deemed to be in very low disease activity. 

If you are interested in using the VLDA Index for commercial purposes, including clinical, organisational, or consultancy applications, please get in touch to discuss licensing options. We offer licence agreements to suit different commercial needs.

📩 Contact us at enquiries@licensing.leeds.ac.uk to begin the conversation about commercial licensing.

Academic/Research Licences (available to order):

The VLDA Index was originally developed for UK/English. It is available for academic and research purposes under the following terms:

 • Original UK/English version: Free of charge for academic/research use only (i.e. strictly non-commercial purposes).

 • Approval Process: All licence requests are subject to review and approval.

 • Eligibility: Academic/research licences are only granted to individuals affiliated with a university or recognised research institution.

 • Email Requirement: Requests must be submitted using an academic email address (either your own or your supervisor’s).