Development of a brief measure to assess quality of life in obesity

Kolotkin, Ronette L.; Crosby, Ross D.; Kosloski, Karl D.; Williams, G. Rhys

doi:10.1038/oby.2001.13

Cited by 641Obesity and Health PracticesObesity, Physical Activity, DietEating Disorders and Behaviors

Development of a brief measure to assess quality of life in obesity

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Kolotkin, Ronette L., Crosby, Ross D., Kosloski, Karl D., Williams, G. Rhys·2001·Obesity Research

DOI 10.1038/oby.2001.13

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Abstract

OBJECTIVE: Obesity researchers have a growing interest in measuring the impact of weight and weight reduction on quality of life. The Impact of Weight on Quality of Life questionnaire (IWQOL) was the first self-report instrument specifically developed to assess the effect of obesity on quality of life. Although the IWQOL has demonstrated excellent psychometric properties, its length (74 items) makes it somewhat cumbersome as an outcome measure in clinical research. This report describes the development of a 31-item version of the IWQOL (IWQOL-Lite). RESEARCH METHODS AND PROCEDURES: IWQOLs from 996 obese patients and controls were used to develop the IWQOL-Lite. Psychometric properties of the IWQOL-Lite were examined in a separate cross-validation sample of 991 patients and controls. RESULTS: Confirmatory factor analysis provided strong support for the adequacy of the scale structure. The five identified scales of the IWQOL-Lite (Physical Function, Self-Esteem, Sexual Life, Public Distress, and Work) and the total IWQOL-Lite score demonstrated excellent psychometric properties. The reliability of the IWQOL-Lite scales ranged from 0.90 to 0.94 and was 0.96 for the total score. Correlations between the IWQOL-Lite and collateral measures supported the construct validity of the IWQOL-Lite. Changes in IWQOL-Lite scales over time correlated significantly with changes in weight, supporting its sensitivity to change. Significant differences in IWQOL-Lite scale and total scores were found among groups differing in body mass index, supporting the utility of the IWQOL-Lite across the body mass index spectrum. DISCUSSION: The IWQOL-Lite appears to be a psychometrically sound and clinically sensitive brief measure of quality of life in obese persons.

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The IWQOL-Lite is a validated weight-specific questionnaire to evaluate health-related quality of life.
“The Impact of Weight on Quality of Life Questionnaire (IWQOL-Lite; 32) is a weight-specific questionnaire to evaluate health-related quality of life (HRQoL).”
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Authors: Kolotkin, R. L., Crosby, R. D., Kosloski, K. D., & Williams, G. R.
Affiliations: Duke Medical Center (US)
University of North Dakota (US)
University of Nebraska at Omaha (US)
Corresponding author: Kolotkin, Ronette L.
ORCID: Kolotkin, Ronette L.
Crosby, Ross D.
Venue: Obesity Research
Publisher: Wiley
Published: 2001-02
Volume: 9
Issue: 2
Pages: 102-111
ISSN: 1071-7323 (ISSN-L)
1550-8528
DOI: 10.1038/oby.2001.13
OpenAlex: W1993747099
Cited by: 641
References: 37
Citations by year: 2026: 19 · 2025: 19 · 2024: 22 · 2023: 18 · 2022: 24 · 2021: 22 · 2020: 25 · 2019: 21 · 2018: 36 · 2017: 39 · 2016: 31 · 2015: 45 · 2014: 41 · 2013: 45 · 2012: 41
FWCI: 44.25
Type: journal article
Language: en
Open access: bronze
doi.org
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor, 4235 d)
Locations: Obesity Research (publishedVersion)
PubMed (publishedVersion)
Topics: Health Sciences › Health Professions › Pharmacy › Obesity and Health Practices
Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
Keywords: obesity, quality of life, IWQOL-Lite, psychometric properties, self-esteem, sexual life, physical function, public distress, work, body mass index, weight loss
MeSH terms: Adult, Female, Humans, Male, Middle Aged, Obesity, Psychometrics, Quality of Life, Surveys and Questionnaires, Reproducibility of Results, Multivariate Analysis

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Development of a brief measure to assess quality of life in obesity

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