Ferrans and Powers Quality of Life Index (QLI)
The QLI was developed by Carol Estwing Ferrans and Marjorie Powers in 1984 to measure quality of life in terms of satisfaction with life. The QLI measures both satisfaction and importance regarding various aspects of life.
Importance ratings are used to weight satisfaction responses, so that scores reflect satisfaction with the aspects of life that are valued by the individual. The QLI produces five scores: quality of life overall and in four domains (health and functioning, psychological/spiritual domain, social and economic domain, and family).
A number of versions of the QLI have been developed for use with various disorders and the general population, and have been reported in more than 200 published studies. A common set of items forms the basis for all versions, and items pertinent to each disorder were added to create the illness-specific versions.
This website contains everything you need to use the QLI
The following are available in their entirety on this website:
- the questionnaires in English and translations into other languages
- scoring instructions and computer syntax for calculating scores
- evidence of reliability, validity, and sensitivity/responsiveness
- listing of published research studies that have used the QLI.
Charges for use of the QLI
The QLI is a copyrighted instrument. The QLI is made available through this website for use in non-profit research and non-profit clinical practice, for which there is no charge for use of the QLI. This permission applies only to use of the QLI as it can be printed from this website (for example, paper copies printed from the website). This permission does not apply to incorporation of the QLI or any of its items into computer software, including software for administration by computer. This permission also does not apply to any for-profit use of the QLI or to any sales of materials including the QLI. A licensing agreement is required for incorporation of the QLI into computer software and for all for-profit use. A licensing agreement also is required for all sales of materials including the QLI. Contact Dr. Carol Ferrans directly at the University of Illinois at Chicago regarding licensing agreements.
Please send us your publications
If you do use the QLI for your research or clinical practice, we would appreciate it if you would send us a copy of any publications reporting your work using the QLI. We will add them to the listing of publications on this website. Send the publications to Dr. Ferrans at the address listed in this website.
If the QLI is not listed in the language you need
If you need the QLI in a language that is not available on this website, please contact Dr. Ferrans at the address listed in this website. There are translations that have been completed (or are in process) that are not yet posted on this web site.
How To Print The Web Pages
To print The Quality of Life Index Overview, Reliability and Validity, and Published Research Using QLI web pages, please put your cursor anywhere over the text on the page and left click on your mouse. This selects the right frame of the website. The top banner on the webpage is considered a frame and the left page border bar on the webpage is also a frame. You want to select the right frame, the page with the text information. Then click on 'File' at the top of your browser menu and click Print Frame under the Print command.