The Impact of Weight on Quality of Life-Lite (IWQOL-Lite)© is a validated, 31-item, self-report measure of obesity-specific quality of life in adults, available in multiple languages. The scale structure of the IWQOL-Lite has been verified with confirmatory factor analysis, and IWQOL-Lite scores are sensitive to changes in weight. There is strong evidence for validity and reliability.

In addition to a total score, there are scores on five domains:

• Physical function (11 items)
• Self-esteem (7 items)
• Sexual life (4 items)
• Public distress (5 items)
• Work (4 items)

Important: Scores range from 0 to 100, with 100 representing the best quality of life. Raw scores are no longer used for reporting. Read more about scoring here.
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Available Translations
To date, a total of 81 harmonized translations of the IWQOL-Lite© have been developed in accordance with industry standards.

Publications
You may view key papers relating to IWQOL-Lite here.

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IWQOL-Lite
Available Languages

IWQOL-Lite
Publications

How to Cite IWQOL-Lite

Kolotkin, R.L., Crosby, R.D., Kosloski, K.D., and Williams, G.R. Development of a brief measure to assess quality of life in obesity. Obesity Research, 2001, 9 (2), 102-111.

Kolotkin, R.L., Crosby, R.D. Psychometric evaluation of the Impact of Weight on Quality of Life-Lite questionnaire (IWQOL-Lite) in a community sample. Quality of Life Research, 2002, 11(2), 157-171.

Licensing IWQOL-Lite©

Licensing for is managed solely through Pattern Health, a team of technologists, clinicians and behavioral researchers whose vision is to make healthcare more efficient and effective by creating products that empower patient self-care and research.

The new digital versions, which can be used standalone or integrated into digital care plans and clinical trials, will be more accessible and engaging for patients while improving the accuracy and reliability of the collected data.

Click the button below to engage Pattern Health with questions or licensing information.

Click for Information and Licensing

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Important Note about Scoring

In order to be able to compare your results to those of other studies, it is important to score the IWQOL-Lite correctly (i.e. convert raw scores to transformed scores on a scale of 0-100, where 100 represents the best quality of life.)

Raw scores are no longer used for reporting. Read more here.