Impact of Weight on Quality of Life
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The IWQOL-Lite©️ and IWQOL-Lite-CT©️ are copyrighted, validated patient-reported outcome (PRO) measures of weight-related quality of life in adults, designed for use in research, clinical practice, and clinical trials.

They were developed by Ronette “Ronnie” L. Kolotkin, Ph.D., owner of Quality of Life Consulting, PLLC, and consulting professor at Duke University. The IWQOL-Lite and the IWQOL-Lite-CT instruments are copyrighted by Duke University.

 

IWQOL-Lite©

The IWQOL-Lite was developed using rigorous methods, demonstrating strong psychometric properties, and is validated for adults with obesity.

  • Reported on in about 400 research studies and many clinical practices since its development in 2001.
  • Linguistically validated translations available in >80 languages.
  • 31 items with scores in multiple domains, on a 0-100 scale (100 being best quality of life):
    • Physical function
    • Self-esteem
    • Sexual life
    • Public distress
    • Work
    • Total score
  • Flexible format options:
    • Print/PDF
    • Web
    • App

We are the exclusive licensor of the IWQOL-Lite.

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IWQOL-Lite-Clinical Trials© (IWQOL-Lite-CT©)

IWQOL-Lite-CT was developed to meet the developmental rigor required by the Food and Drug Administration (FDA) to support product labeling. FDA qualification for the IWQOL-Lite-CT is being sought for use in clinical trials to support product-labeling claims in new obesity treatments, including medications.

  • Validated, 20-item, self-report measure of weight-related quality of life, optimized for use in the adult patient population targeted for obesity clinical trials, both with and without type 2 diabetes.
  • Reported on in about 80 published studies since its development in 2017.
  • Linguistically validated translations available in >90 languages.
  • 20 items with scores in multiple domains, on a 0-100 scale (100 being best quality of life):
    • Physical
    • Physical function
    • Psychosocial Self-esteem
    • Overall
  • Flexible format options:
    • Print/PDF
    • Web
    • App

We are the exclusive licensor of the IWQOL-Lite-CT. Learn more about the supported implementation options here: IWQOL-Lite-CT©️ Implementation Options.

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Supported implementation options include:

1. Greenlight’s eCOA solution.

Next-gen solution with IWQOL-Lite and IWQOL-Lite-CT pre-built and approved.

2. Third-party eCOA solution.

Custom option for those with an existing eCOA system.

3. Paper-based
solution.

The simple but effort-intensive option.

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About the Author
Ronette “Ronnie” Kolotkin, Ph.D.

Ronette “Ronnie” Kolotkin, Ph.D., author of IWQOL-Lite and IWQOL-Lite-CT.

Dr. Ronette Kolotkin is a research and practicing psychologist who focuses on understanding, measuring, and optimizing health-related quality of life. She consults with pharmaceutical companies, academic institutions and other organizations on measurement and interpretation of quality-of-life assessments in pharmaceutical and healthcare research, and in the development of products or services. She holds faculty appointments in the US and Norway:

  • Consulting Professor in the Department of Family Medicine and Community Health at Duke University School of Medicine, Durham, North Carolina, USA
  • Professor Emerita at Western Norway University of Applied Sciences, Førde, Norway; Førde Hospital Trust, Førde, Norway; and Morbid Obesity Centre, Vestfold Hospital Trust, Tønsberg, Norway