Psychometric evaluation of the German version of the impact of weight on quality of life-lite (IWQOL-lite) questionnaire
Abstract
OBJECTIVE: To evaluate the psychometric properties of a German version of the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) questionnaire. METHOD: IWQOL-Lite scores were obtained from 351 overweight/obese individuals and 127 lean adult volunteers. In addition, a subgroup of 126 obese subjects completed also the German versions of the 36-item short-form health survey (SF-36), the Beck Depression Inventory (BDI), the Eating Disorder Examination-Questionnaire (EDE-Q), and the German validated version of the Three-Factor Eating Questionnaire (TFEQ). RESULTS: The German version of the IWQOL-Lite has psychometric properties comparable to those found for the original version and demonstrates high internal consistency and excellent construct validity. Furthermore, the German IWQOL-Lite clearly discriminates between groups based on BMI on all subscales and the total score. CONCLUSION: The results of the present study suggest that the German IWQOL-Lite is a psychometrically validated instrument with which to measure weight-specific health related quality of life.
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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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Fuller, N. R., Colagiuri, S., SCHOFIELD, D. J., Olson, A. D., Shrestha, R. N., Holzapfel, C., Wolfenstetter, S. B., Holle, R., Ahern, A. L., Hauner, H., et al. (2012) · International Journal of Obesity · doi:10.1038/ijo.2012.139 · Cited by 2,125 · see citing works
Self-citationde Zwaan, M., Herpertz, S., Zipfel, S., Svaldi, J., Friederich, H.-C., Schmidt, F., Mayr, A., Lam, T., Schade-Brittinger, C., & Hilbert, A. (2017) · JAMA Psychiatry · doi:10.1001/jamapsychiatry.2017.2150 · Cited by 153 · see citing works
de Zwaan, M., Georgiadou, E., Stroh, C., Teufel, M., Köhler, H., Tengler, M., & ller, A. M. ⁄. (2014) · Frontiers in Psychology · doi:10.3389/fpsyg.2014.01310 · Cited by 129 · see citing works
“A validated German version is available (Mueller et al., 2011).”
Self-citationHübner, C., Schmidt, R., Selle, J., Köhler, H., Müller, A., de Zwaan, M., & Hilbert, A. (2016) · PLoS ONE · doi:10.1371/journal.pone.0165566 · Cited by 51 · see citing works
Self-citationde Zwaan, M., Herpertz, S., Zipfel, S., Tuschen‐Caffier, B., Friederich, H., Schmidt, F., Gefeller, O., Mayr, A. J., Lam, T., Schade‐Brittinger, C., et al. (2012) · Trials · doi:10.1186/1745-6215-13-220 · Cited by 47 · see citing works
“Quality of life will be measured using the Impact of Weight on Quality of Life Scale-Lite (IWQOLLite) [38,39], physical activity will be measured using the International Physical Activity Questionnaire (IPAQ) [40], and BMI will be calculated from measured weight and height (kg/m(2)).”
MethodSelf-citationFuller, N. R., Carter, H. E., SCHOFIELD, D. J., Hauner, H., Jebb, S. A., Colagiuri, S., & Caterson, I. D. (2013) · International Journal of Obesity · doi:10.1038/ijo.2013.227 · Cited by 37 · see citing works
Self-citationMayr, A. J., Gefeller, O., Prokosch, H., Pirkl, A., Fröhlich, A., & de Zwaan, M. (2012) · Journal of Clinical Epidemiology · doi:10.1016/j.jclinepi.2012.03.005 · Cited by 36 · see citing works
“For the GWCR, participants besides weight-related measures and sociodemographic characteristics, also completed various standardized psychometric scales, including the Impact of Weight on Quality-of-Life-Lite scale [15,16], which is a weight-specific measure of health-related quality of life [17].”
MethodSelf-citationBlume, M., Schmidt, R., Schmidt, J., Martin, A., & Hilbert, A. (2021) · Neurotherapeutics · doi:10.1007/s13311-021-01149-9 · Cited by 35 · see citing works
“Validated self-report measures were applied to assess self-efficacy, perceived stress, depressive symptoms, quality of life, and impulsiveness, using the General Self-Efficacy Scale (GSE) [25], Perceived Stress Questionnaire (PSQ) [26], Patient Health Questionnaire-Depression (PHQ-D) [27], Impact of Weight on Quality…”
MethodHilbert, A., Staerk, C., Strömer, A., Mansfeld, T., Sander, J., Seyfried, F., Kaiser, S., Dietrich, A., & Mayr, A. J. (2022) · JAMA Network Open · doi:10.1001/jamanetworkopen.2022.26244 · Cited by 29 · see citing works
Kolotkin, R. L., Ervin, C. M., Meincke, H. H., Højbjerre, L., & Fehnel, S. E. (2017) · Clinical Obesity · doi:10.1111/cob.12197 · Cited by 28 · see citing works
Self-citationDevelopment and Evaluation of the Quality of Life for Obesity Surgery (QOLOS) Questionnaire
Müller, A., Crosby, R. D., Selle, J., Osterhues, A., Köhler, H., Mall, J. W., Meyer, T., & de Zwaan, M. (2017) · Obesity Surgery · doi:10.1007/s11695-017-2864-6 · Cited by 25 · see citing works
Self-citationGrundeis, F., Brand, C., Kumar, S., Rullmann, M., Mehnert, J., & Pleger, B. (2017) · Frontiers in Neuroscience · doi:10.3389/fnins.2017.00334 · Cited by 21 · see citing works
Group for the Study of Obesity of the Spanish Endocrinology and Nutrition Society (SEEN), Caixàs, A., Lecube, A., Morales, M.-J., Calañas, A., Moreiro, J., Cordido, F., Díaz, M.-J., Masmiquel, L., Moreno, B., et al. (2012) · Obesity Surgery · doi:10.1007/s11695-012-0791-0 · Cited by 20 · see citing works
“To date, the IWQOL— Lite has demonstrated adequate psychometric properties in a variety of populations and settings (community sample, psychiatric subgroups) [17], and it has also been validated and adapted for use in Spain from Spanish [15], Portuguese [14], Brazilian Portuguese [18], and German [19].”
MethodSelf-citationPapadopoulos, S., Garcia, X. D. L. P., & Brennan, L. (2021) · Obesity Reviews · doi:10.1111/obr.13267 · Cited by 20 · see citing works
Andrés, A., Saldaña, C., Mesa, J., & Lecube, A. (2011) · Obesity Surgery · doi:10.1007/s11695-011-0518-7 · Cited by 15 · see citing works
Cognitive-Behavioral Therapy for Postbariatric Surgery Patients With Mental Disorders: A Pilot Study
Rudolph, A., & Hilbert, A. (2020) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2020.00014 · Cited by 13 · see citing works
“Obesity-specific quality of life was assessed with the German version of the Impact of Weight on Quality of Life–Lite (35).”
MethodFactors Associated with Health-Related Quality of Life Among Overweight and Obese Korean Women
Choo, J., Turk, M. T., Jae, S. Y., & Choo, I. H. (2015) · Women & Health · doi:10.1080/03630242.2014.979966 · Cited by 12 · see citing works
“…weight-related HRQOL, most previous studies elucidated a significant relation of BMI to IWQOL among obese or morbidly obese individuals, specifically those awaiting bariatric surgery, compared to those having a normal-weight (Andrés et al. 2012; de A Mariano et al. 2010; Mueller et al. 2011).”
ResultBarchfeld, D. C., Vagi, R.-K., Lüdtke, K., Schieffer, E., Güler, F., Einecke, G., Jäger, B., de Zwaan, M., & Nöhre, M. (2023) · Frontiers in Psychiatry · doi:10.3389/fpsyt.2023.1071705 · Cited by 10 · see citing works
Self-citationMapping IWQOL-Lite onto EQ-5D-5L and SF-6Dv2 among overweight and obese population in China
Guo, W., Xie, S., Wang, D., & Wu, J. H. (2024) · Quality of Life Research · doi:10.1007/s11136-023-03568-x · Cited by 9 · see citing works
Hilbert, A., Neuhaus, P., Köhler, N., Petroff, D., Hay, P., & Hübner, C. (2021) · Journal of Consulting and Clinical Psychology · doi:10.1037/ccp0000668 · Cited by 8 · see citing works
Hilbert, A., Klotz, U., Sadeghi, S., Juarascio, A. S., & Kirsten, T. (2025) · International Journal of Eating Disorders · doi:10.1002/eat.24479 · Cited by 7 · see citing works
Hilbert, A., Juarascio, A. S., Prettin, C., Petroff, D., Schlögl, H., & Hübner, C. (2023) · BMJ Open · doi:10.1136/bmjopen-2022-064394 · Cited by 4 · see citing works
Hilbert, A., Blume, M., Petroff, D., Neuhaus, P., Smith, E., Hay, P., & Hübner, C. (2018) · BMJ Open · doi:10.1136/bmjopen-2018-022616 · Cited by 4 · see citing works
Hauner, H., Wirth, A. G., Gola, U., Teufel, M., Zipfel, S., de Zwaan, M., Hüttl, T. P., Kramer, K. M., & Winckler, K. (2013) · Springer eBooks · doi:10.1007/978-3-642-22855-1_7 · Cited by 4 · see citing works
Self-citationSchraven, S., Hübner, C., Eichler, J., Mansfeld, T., Sander, J., Seyfried, F., Kaiser, S., Dietrich, A., Schmidt, R., & Hilbert, A. (2024) · Obesity Facts · doi:10.1159/000537689 · Cited by 2 · see citing works
“…eating disorder psychopathology; the Patient Health Questionnaire (PHQ-9) [17], assessing depression; the Impact of Weight on Quality of Life-Lite (IWQOL-Lite) [18, 19], assessing body weight-related quality of life; and the General Self-Ef fi cacy Scale (GSES) [20], assessing self-ef fi cacy.”
MethodLiu, X., Hong, T., Luo, C. S., Xie, S., & Wu, J. H. (2024) · Health and Quality of Life Outcomes · doi:10.1186/s12955-024-02313-3 · Cited by 3 · see citing works
Hilbert, A., Strömer, A., Staerk, C., Schreglmann, B., Mansfeld, T., Sander, J., Seyfried, F., Kaiser, S., Stroh, C., Dietrich, A., et al. (2025) · International Journal of Eating Disorders · doi:10.1002/eat.24527 · Cited by 4 · see citing works
Food Addiction und Alkoholkonsum vor Adipositaschirurgie
Thomas, T. A., Pommnitz, M., Tilk, K., Meyer, G., Hüttl, T. P., de Zwaan, M., & Müller, A. (2022) · SUCHT - Zeitschrift für Wissenschaft und Praxis / Journal of Addiction Research and Practice · doi:10.1024/0939-5911/a000773 · Cited by 2 · see citing works
Self-citationAbbas, L. A., Salameh, P., Mansour, Z., et al. (2015) · Clinical Epidemiology and Global Health · doi:10.1016/j.cegh.2015.08.001 · Cited by 2 · see citing works
Kaden, J., Hübner, C., Mansfeld, T., Sander, J., Seyfried, F., Kaiser, S., Dietrich, A., & Hilbert, A. (2024) · Obesity Facts · doi:10.1159/000539857 · Cited by 2 · see citing works
“Previous research has shown good validity and excellent reliability of the German IWQOL-Lite [31].”
MethodPsychosoziale Evaluation vor Adipositaschirurgie
Müller, A. (2022) · Springer eBooks · doi:10.1007/978-3-662-65556-6_20 · Cited by 1 · see citing works
Psychosoziale Evaluation vor Adipositaschirurgie
Müller, A. (2018) · Springer eBooks · doi:10.1007/978-3-662-57364-8_20
Management – Strategie – Schulung
Hauner, H. (2024) · Springer eBooks · doi:10.1007/978-3-662-58895-6_35
Self-citation
- Authors
- Mueller, A., Holzapfel, C., Hauner, H., Crosby, R. D., Engel, S. G., Mühlhans, B., Kolotkin, R. L., Mitchell, J. E., Horbach, T., & Zwaan, M. D.
- Affiliations
- Friedrich-Alexander-Universität Erlangen-Nürnberg (DE)
- Technical University of Munich (DE)
- University of North Dakota (US)
- Duke University (US)
- Stadtkrankenhaus Schwabach (DE)
- Venue
- Experimental and Clinical Endocrinology & Diabetes
- Publisher
- Georg Thieme Verlag KG
- Published
- 2010-07-23
- Volume
- 119
- Issue
- 02
- Pages
- 69-74
- ISSN
- 0947-7349 (ISSN-L)
- 1439-3646
- OpenAlex
- W2005085367
- Cited by
- 33
- References
- 0
- Citations by year
- 2025: 2 · 2024: 5 · 2023: 2 · 2022: 3 · 2021: 3 · 2020: 1 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 2 · 2014: 1 · 2013: 2 · 2012: 4
- FWCI
- 2.45
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Experimental and Clinical Endocrinology & Diabetes (publishedVersion)
- PubMed (publishedVersion)
- mediaTUM – the media and publications repository of the Technical University Munich (Technical University Munich) (submittedVersion)
- Funders
- Bundesministerium für Bildung und Forschung
- Topics
- Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
- Health Sciences › Health Professions › Pharmacy › Obesity and Health Practices
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Keywords
- IWQOL-Lite, weight-related quality of life, obesity, overweight, German translation, psychometric validation, construct validity, internal consistency, body mass index, health-related quality of life, dietary habits
- MeSH terms
- Adult, Body Weight, Female, Germany, Health Surveys, Humans, Male, Middle Aged, Obesity, Psychometrics, Quality of Life, Surveys and Questionnaires, Reproducibility of Results, Body Mass Index, Overweight
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