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Our series of quality of life questionnaires can be used for clinical, research, commercial or non-commercial use.

Our quality of life questionnaires

For specific information, including the recall period, how to score them, and to download them, please select the relevant questionnaire:

General dermatology

Disease-specific dermatology

Family members dermatology

Generic use across all medical specialities

How they can be used

You can use the questionnaires in a range of settings, from routine clinical purposes to research studies.

Depending on who you are and what you're intending to use them for, you may have to apply for a licence, as well as pay a fee.

Apply for a licence

Please fill in our online application form to secure your instantaneous licence. Please note that for all prospective studies (for example, a study with a protocol that requires prior ethical permission), you must apply for a licence in advance.

Online application form

Please note: To apply for a licence to use the Psoriasis Disability Index (PDI) or the Cardiff Acne Disability Index (CADI) please directly contact Technology Transfer office at technologytransfer@cardiff.ac.uk. It is not possible to apply using our online licensing system.

All correspondence and data is handled in confidence by the University and is never distributed to any third party. Read our data protection policy.

How to administer them

Respondents should complete the questionnaire unaided unless there is some specific confusion and they ask for help in understanding a particular question. Nearly all respondents find it easy to complete the questionnaire unaided.

Under no circumstances should respondents be guided to tick an option, such as the ‘Not relevant’ option, as this could lead to bias.

It is also not appropriate to place the score numbers next to the questionnaire answer choices. This is because all of the validation of the questionnaires has taken place without this. Having the numbers present might alter the way in which the respondents answer.

Over the phone

Many of our questionnaires have been administered over the telephone. However, there is no formal validation of this approach.

Use outside validated age ranges

If you use the questionnaires outside of their validated age ranges, the data should be analysed and interpreted with the caveat that it is not formally validated.

Reproduction of our measures in publications

All of our measures are copyrighted and we do not allow these to be reproduced in any publication. However, you may describe any changes or modifications made if these have been approved by Cardiff University.

Changing the format, wording or design

It is not possible to change the content, wording, or question sequence of the questionnaires. Please remember that any changes without permission would be considered a violation of international copyright laws.

Please note in all instances the copyright statement must be reproduced at the end of the questionnaire. You can find the statement on the individual questionnaire pages.

New translations and linguistic validation

All language versions have full linguistic validation, with a minimum of two parallel independent forward translations, then co-operative agreement, then two independent back translations. There is then a process of further forward and backward translations until we are satisfied that the translation is as accurate as possible.

If you would like to create a new translation, please contact us so we can work with you to create a version that meets our strict validation requirements.

Please do not attempt to undertake a new translation without speaking to us first.

If you'd like to know more about our translation and linguistic validation, or our adjustment of original English text to adapt to local English language use, please contact us.

All currently available translations of our questionnaires are available on the individual questionnaire webpages under the 'Different language versions' heading.

Contact us

If you have any questions, or if you have feedback on our web pages please get in touch.

Our address

Dermatology Quality of Life Administrator
Cardiff University School of Medicine
Third floor, Glamorgan House
Heath Park, Cardiff
CF14 4XN
United Kingdom