The Leeds Dactylitis Index (LDI)
The Leeds dactylitis index (LDI) is a tool for measuring the activity of dactylitis in psoriatic arthritis. Dactylitis is a key feature of this disease, a poor prognostic marker, and a target for treatment. Almost all new pharmaceuticals tested for psoriatic arthritis are tested against this metric
The Leeds dactylitis index measures the severity and activity of dactylitis. It incorporates a measurement instrument (dactylometer – currently manufactured outside the University) and utilises an algorithm for calculation of the index. A guide for the LDI is available.
Commercial Licences:
If you are interested in using the LDI 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 LDI was originally developed in 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).
○ Translations:
○ Arrange your own translation of the original UK/English version (subject to licence terms), or
○ Purchase an official translation for academic/research use at a cost of £350 (excl. VAT) per language.
○ You can request translations during the checkout process (coming soon)
• 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).
Available Translations (coming soon):
Colombia/Spanish
Mexico/Spanish
Japan/Japanese
South Korea/Korean
Brazil/Portuguese
China/Simplified Chinese
Taiwan/Traditional Chinese
-
expand_more library_books References (3)
- Philip S Helliwell, Jill Firth, Gamal H Ibrahim, Richard D Melsom, Irfan Shah, Deborah E Turner , Development of an assessment tool for dactylitis in patients with psoriatic arthritis
- Paul J Healy, Philip S Helliwell , Measuring dactylitis in clinical trials: which is the best instrument to use?
- P J Healy, C Groves, M Chandramohan, P S Helliwell , MRI changes in psoriatic dactylitis--extent of pathology, relationship to tenderness and correlation with clinical indices
-
expand_more cloud_download Supporting documents (1)Product brochureThe Leeds Dactylitis Index (LDI).pdfAdditional files may be available once you've completed the transaction for this product. If you've already done so, please log into your account and visit My account / Downloads section to view them.