FAQs

Why a EULAR OML?

Because there are many versions of the instruments we use in rheumatology and we may be using the ones with poorer validation. The EULAR OML aims to be a comprehensive catalogue of validated instruments (indices, questionnaires, scales, or others), with an emphasis on PROs used in rheumatology.

Why a catalogue in rheumatology if there are generic libraries?

• Besides our love for this growing field of research, there are the following reasons why we created this catalogue in rheumatology: To reduce variability through Europe. The use of instruments in research based on scientific grounds—the level of validation achieved and appropriateness for the clinical situation—will improve the scientific level of projects, and will reduce variability among countries with lower development or support on methodological matters.
• To increase transparency. The methodology for including instruments is explicit, and any can contribute if an instrument or a version is missing.
• To increase the awareness of researchers outside the field of rheumatology.
• To educate the rheumatology community on the concepts of measure and validation of instruments, and on the importance of using the right tool in the appropriate way.

Who contributes to the OML?

This EULAR resource is open to all who have an interest in PROs. You can contribute by sending us information about a given PRO, or on a long term by committing for any given rheumatic or musculoskeletal disease or topic (e.g., work productivity).

Is there money involved in the OML?

The OML is a EULAR-funded project. The initial volunteers were unpaid. Those who contribute are not paid either. Each year a paid fellow updates and fixes bugs in the OML. The pharmaceutical industry plays no role in the OML.

What about the copyrighted instruments?

PROs which are copyrighted are not presented in full text version since they are copyrighted. Instead, we present the link to the owner, and to the landing page.

Who selects the questionnaires in the OML and how are they selected?

The instruments are found by a systematic literature review coupled with expert opinion, by volunteers who are experts in their field. There is no selection of PROs since our aim is to be exhaustive for all PROs used in the field of rheumatology and published at least in English. If you think a PRO should be included and was not, please, let us now.

What if I find an error?

Errors and omissions are absolutely possible. We have to manage a myriad of questionnaires and our time is limited. If you find an error, please, let us now