Psychometric evaluation of the German version of the impact of weight on Quality of Life-Lite (IWQOL-Lite) questionnaire

Exp Clin Endocrinol Diabetes. 2011 Feb;119(2):69-74. doi: 10.1055/s-0030-1261922. Epub 2010 Jul 23.

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.

Publication types

  • Research Support, Non-U.S. Gov't
  • Validation Study

MeSH terms

  • Adult
  • Body Mass Index
  • Body Weight / physiology*
  • Female
  • Germany
  • Health Surveys / methods*
  • Humans
  • Male
  • Middle Aged
  • Obesity / epidemiology
  • Obesity / psychology
  • Overweight / epidemiology
  • Overweight / psychology
  • Psychometrics* / methods
  • Quality of Life*
  • Reproducibility of Results
  • Surveys and Questionnaires*