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
• Available Languages for the IWQOL-Lite:
• Afrikaans for South Africa, Arabic for UAE (United Arabic Emirates), Arabic for Israel, Bengali for India, Bulgarian for Bulgaria, Catalan for Spain, Cebuano for Philippines, Chinese for Hong Kong, Chinese for Taiwan, Czech for Czech Republic, Danish for Denmark, Dutch for Netherlands, Dutch for Belgium, English for Australia, English for Canada, English for India, English for Malaysia, English for New Zealand, English for Philippines, English for Singapore, English for South Africa, English for the UK (including Ireland), English for the US, Estonian for Estonia, Finnish for Finland, French for France, French for Belgium, French for Canada, French for Switzerland, German for Germany, German for Austria, German for Switzerland, Greek for Greece, Gujarati for India, Harmonized Latin American and U.S. Spanish, Hebrew for Israel, Hindi for India, Hungarian for Hungary, Italian for Italy, Italian for Switzerland, Japanese for Japan, Kannada for India, Korean for Korea, Latvian for Latvia, Lithuanian for Lithuania, Malay for Malaysia, Malay for Singapore, Malayalam for India, Mandarin for Malaysia, Mandarin for Singapore, Marathi for India, Norwegian for Norway, Polish for Poland, Portuguese for Portugal, Portuguese for Brazil, Romanian for Romania, Russian for Russia, Russian for Israel, Russian for Estonia, Russian for Latvia, Russian for Ukraine, Slovakian for Slovakia, Spanish for Spain, Spanish for Argentina, Spanish for Chile, Spanish for Costa Rica, Spanish for Mexico, Spanish for Peru, Spanish for Puerto Rico, Spanish for the USA, Swedish for Sweden, Swedish for Finland, Tagalog for Philippines, Tamil for India, Tamil for Malaysia, Telugu for India, Thai for Thailand, Turkish for Turkey, Ukrainian for Ukraine, Urdu for India, Xhosa for South Africa, and Zulu for South Africa.
• Recommended by the European Association of Endoscopic Surgery
• 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.