Dermatology Life Quality Index
The Dermatology Life Quality Index or DLQI, developed in 1994, was the first dermatology-specific Quality of Life instrument. It is a simple 10-question validated questionnaire that has been used in over 40 different skin conditions in over 80 countries and is available in over 90 languages. Its use has been described in over 1000 publications including many multinational studies. The DLQI is the most frequently used instrument in studies of randomised controlled trials in dermatology. More information can be found on the Cardiff University website.
The Dermatology Life Quality Index questionnaire is designed for use in adults, i.e. anyone over the age of 16. It is self explanatory and is usually completed in one to two minutes. If repeated, there should be an interval of at least 7 days between completing the next one. It may be helpful to show whether your NP is improving or imparing the quality of your life.
The DLQI is calculated by summing the score of each question resulting in a maximum of 30 and a minimum of 0. The higher the score, the more quality of life is impaired. The DLQI can also be expressed as a percentage of the maximum possible score of 30.
Meaning of DLQI Scores
0-1 = no effect at all on patient’s life
2-5 = small effect on patient’s life
6-10 = moderate effect on patient’s life
11-20 = very large effect on patient’s life
21-30 = extremely large effect on patient’s life