Impact of Weight on Quality of Life-Lite
(IWQOL-Lite^©†)

• A validated, 31-item, self-report measure of obesity-specific quality of life¹
• In addition to a total score, there are scores on five domains:
• Physical function
• Self-esteem
• Sexual life
• Public distress
• Work
• Good internal consistency (ranging from .90 to .96) ¹
• Good test-retest reliability (.83 to .94) ²
• Responsive to weight loss and weight gain ^3,4
• Sensitive to treatment-seeking status ^5,6
• Sensitive to degree of obesity ⁷
• A scale structure supported by confirmatory factor analysis ¹
• Translated/adapted for use in the following languages:
• Afrikaans, Arabic for Israel, Bengali, Bulgarian, Catalan, Cebuano, Chinese for Hong Kong, Chinese for Taiwan, Czech, Danish, Dutch, Dutch for Belgium, English for Australia, English for Canada, English for India, English for Malaysia, English for Phillipines, English for South Africa, English for the UK, Estonian, Finnish, French, French for Belgium, French for Canada, French for Switzerland, German, German for Austria, German for Switzerland, Greek, Gujarati, Harmonized Latin American and U.S. Spanish, Hebrew, Hindi, Hungarian, Italian, Italian for Switzerland, Japanese, Kannada, Korean, Latvian, Lithuanian, Malayalam, Marathi, Norwegian, Polish, Portuguese, Portuguese for Brazil, Romanian, Russian, Russian for Israel, Russian for Ukraine, Slovakian, Spanish for Spain, Swedish, Tagalog, Tamil, Telugu, Turkish, Ukrainian, and Urdu
• Listed in Patient-Reported Outcome and Quality of Life Instruments Database PROQOLID
• Listed in The Compendium of Quality of Life Instruments
• Listed in the On-Line Guide to Quality-of Life-Assessment (OLGA)
• Listed in Suggestions for the Pre-surgical Psychological Assessment of Bariatric Surgery Candidates
• Reviewed in Handbook of Assessment Methods for Eating Behaviors and Weight-related Problems: Measures, Theory, and Research (second edition). Allison DB, Baskin ML, eds.; Sage Publications: Thousand Oaks, CA: 33-78 (Chapter entitled "Assessment of heath-related quality of life in obesity and eating disorders" by Kolotkin RL, Haaz S, Fontaine KR.) http://www.uk.sagepub.com/refbooksProdTOC.nav?prodId=Book230593

For information about the IWQOL-Lite or permission to use the IWQOL-Lite please contact:

Ronette L. Kolotkin, rkolotkin@qualityoflifeconsulting.com (telephone 919 493 9995)

or

Dennis Thomas, Ph.D., Associate Director, Office of Licensing & Ventures, Duke University, dennis.thomas@duke.edu, telephone (919) 681-7580

The license fee for the IWQOL-Lite varies according to use.

† Copyright Duke University

1 Kolotkin RL, Crosby RD, Kosloski KD, Williams GR. Development of a brief measure to assess quality of life in obesity. Obesity Research. 2001;9:102-11.

2 Kolotkin RL, Crosby RD. 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):157-71.

3 Kolotkin RL, Crosby RD, Williams GR, Hartley GG, Nicol S. The relationship between health-related quality of life and weight loss. Obesity Research. 2001;9:564-71.

4 Engel SG, Crosby RD, Kolotkin RL, Hartley GG, Williams GR, Wonderlich SA, Mitchell JE. The impact of weight loss and regain on obesity-specific quality of life: mirror image or differential effect. Obesity Research. 2003;11:1207-13.

5 Kolotkin RL, Crosby RD, Williams GR. Health-related quality of life varies among obese subgroups. Obesity Research. 2002;10:748-56.

6 Kolotkin RL, Crosby RD, Pendleton R, Strong M, Gress RE, Adams TD. Health-related quality of life in patients seeking gastric bypass surgery vs. non-treatment-seeking controls. Obesity Surgery. 2003;13:371-7.

7 White MA, O'Neil PM, Kolotkin RL, Byrne TK. Gender, race, and obesity-related quality of life at extreme levels of obesity. Obesity Research. 2004;12:949-55.